Samuel and the witch of Endor

Was it Samuel himself that appeared to Saul at the witch of Endor?

1Samuel 28:15 And Samuel said to Saul, Why hast thou disquieted me, to bring me up? And Saul answered, I am sore distressed; for the Philistines make war against me, and God is departed from me, and answereth me no more, neither by prophets, nor by dreams: therefore I have called thee, that thou mayest make known unto me what I shall do.
1Samuel 28:16 Then said Samuel, Wherefore then dost thou ask of me, seeing the LORD is departed from thee, and is become thine enemy?

SDA Bible Commentary volume 2, page 1022.7
1 Samuel Chapter 28
7. The Witch and Satan Had an Agreement.–The witch of Endor had made agreement with Satan to follow his directions in all things; and he would perform wonders and miracles for her, and would reveal to her the most secret things, if she would yield herself unreservedly to be controlled by his Satanic majesty. This she had done (1SP 375, 376). {2BC 1022.7}
8-19. Saul’s Final Step.–When Saul inquired for Samuel, the Lord did not cause Samuel to appear to Saul. He saw nothing. Satan was not allowed to disturb the rest of Samuel in the grave, and bring him up in reality to the witch of Endor. God does not give Satan power to resurrect the dead. But Satan’s angels assume the form of dead friends, and speak and act like them, that through professed dead friends he can the better carry on his work of deception. Satan knew Samuel well, and he knew how to represent him before the witch of Endor, and to utter correctly the fate of Saul and his sons. {2BC 1022.8}
Satan will come in a very plausible manner to such as he can deceive, and will insinuate himself into their favor, and lead them almost imperceptibly from God. He wins them under his control, cautiously at first, until their perceptibilities become blunted. Then he will make bolder suggestions, until he can lead them to commit almost any degree of crime. When he has led them fully into his snare, he is then willing that they should see where they are, and he exults in their confusion, as in the case of Saul. He had suffered Satan to lead him a willing captive, and now Satan spreads before Saul a correct description of his fate. By giving Saul a correct statement of his end, through the woman of Endor, Satan opens a way for Israel to be instructed by his satanic cunning, that they may, in their rebellion against God, learn of him, and by thus doing, sever the last link which would hold them to God. {2BC 1022.9}
Saul knew that in this last act, of consulting the witch of Endor, he cut the last shred which held him to God. He knew that if he had not before wilfully separated himself from God, this act sealed that separation, and made it final. He had made an agreement with death, and a covenant with hell. The cup of his iniquity was full (1SP 376, 377).

Patriarchs and Prophets – Chapter 67 – Page 683
The Scripture account of Saul’s visit to the woman of Endor has been a source of perplexity to many students of the Bible. There are some who take the position that Samuel was actually present at the interview with Saul, but the Bible itself furnishes sufficient ground for a contrary conclusion. If, as claimed by some, Samuel was in heaven, he must have been summoned thence, either by the power of God or by that of Satan. None can believe for a moment that Satan had power to call the holy prophet of God from heaven to honor the incantations of an abandoned woman. Nor can we conclude that God summoned him to the witch’s cave; for the Lord had already refused to communicate with Saul, by dreams, by Urim, or by prophets. 1 Samuel 28:6. These were God’s own appointed mediums of communication, and He did not pass them by to deliver the message through the agent of Satan. {PP 683.1}
The message itself is sufficient evidence of its origin. Its object was not to lead Saul to repentance, but to urge him on to ruin; and this is not the work of God, but of Satan. Furthermore, the act of Saul in consulting a sorceress is cited in Scripture as one reason why he was rejected by God and abandoned to destruction: “Saul died for his transgression which he committed against the Lord, even against the word of the Lord, which he kept not, and also for asking counsel of one that had a familiar spirit, to inquire of it; and inquired not of the Lord: therefore He slew him, and turned the kingdom unto David the son of Jesse.” 1 Chronicles 10:13, 14. Here it is distinctly stated that Saul inquired of the familiar spirit, not of the Lord. He did not communicate with Samuel, the prophet of God; but through the sorceress he held intercourse with Satan. Satan could not present the real Samuel, but he did present a counterfeit, that served his purpose of deception.

Deuteronomy 18:10 There shall not be found among you any one that maketh his son or his daughter to pass through the fire, or that useth divination, or an observer of times, or an enchanter, or a witch,
Deuteronomy 18:11 Or a charmer, or a consulter with familiar spirits, or a wizard, or a necromancer.
Deuteronomy 18:12 For all that do these things are an abomination unto the LORD: and because of these abominations the LORD thy God doth drive them out from before thee.
Necromancer: a person who uses witchcraft or sorcery, especially to reanimate dead people or to foretell the future by communicating with them:In the story, the boy is killed by a serial killer and then revived as a zombie by a necromancer. – https://www.dictionary.com/

Spiritual Gifts Volume 4a – Chapter 34 – Page 83
When the Philistines again make war with Israel, Saul is afraid. He has had no rest in any season of peril, and the people are divided. Some go with Saul in all his wickedness. Others cannot trust to his judgment, and wish a righteous ruler. Saul’s last acts have been so cruel, presumptuous and daring, that his conscience is as a scourge, continually upbraiding him. Yet he does not repent of his wickedness, but pursues his relentless course with despairing desperation, and at the prospect of a battle he is distracted and melancholy. He presumes, with his load of guilt upon him, to inquire of God, but God answers him not. He has barbarously massacred the priests of the Lord, because they suffered David to escape. He destroyed the city where the priests lived, and put a multitude of righteous persons to death, to satisfy his envious rage. Yet in his peril he dares to approach God, to inquire whether he shall make war with the Philistines. {4aSG 83.3}
But as God has left him, he seeks a woman with a familiar spirit, who is in communion with Satan. He has forsaken God, and at length seeks one who has made a covenant with death and an agreement with hell, for knowledge. The witch of Endor had made agreement with Satan to follow his directions in all things, and he would perform wonders and miracles for her, and would reveal to her the most secret things, if she would yield herself unreservedly to be controlled by his Satanic Majesty. This she had done. {4aSG 84.1}
When Saul inquired for Samuel, the Lord did not cause Samuel to appear to Saul. He saw nothing. Satan was not allowed to disturb the rest of Samuel in the grave, and bring him up in reality to the witch of Endor. God does not give Satan power to resurrect the dead. But Satan’s angels assume the form of dead friends, and speak and act like them, that through professed dead friends, he can the better carry on his work of deception. Satan knew Samuel well, and he knew how to represent him before the witch of Endor, and to utter correctly the fate of Saul and his sons. {4aSG 84.2}
Satan will come in a very plausible manner to such as he can deceive; and will insinuate himself into their favor, and lead them almost imperceptibly from God. He wins them under his control cautiously at first, until their perceptibilities become blunted. Then he will make bolder suggestions, until he can lead them to commit almost any degree of crime. When he has led them into his snare fully, he is then willing that they should see where they are, and he exults in their confusion, as in the case of Saul. He had suffered Satan to lead him a willing captive, and now Satan spreads before Saul a correct description of his fate. By giving Saul a correct statement of his end, through the woman of Endor, Satan opens a way for Israel to be instructed by his Satanic cunning, that they may, in their rebellion against God, learn of him, and by thus doing, sever the last link which would hold them to God. {4aSG 84.3}
Saul knew that in this last act, of consulting the witch of Endor, he cut the last shred which held him to God. He knew that if he had not before willfully separated himself from God, this act sealed that separation, and made it final. He had made an agreement with death and a covenant with hell. The cup of his iniquity was full.

Patriarchs and Prophets – Chapter 66 – Page 676
“Then said Saul unto his servants, Seek me a woman that hath a familiar spirit, that I may go to her, and inquire of her.” Saul had a full knowledge of the character of necromancy. It had been expressly forbidden by the Lord, and the sentence of death was pronounced against all who practiced its unholy arts. During the life of Samuel, Saul had commanded that all wizards and those that had familiar spirits should be put to death; but now, in the rashness of desperation, he had recourse to that oracle which he had condemned as an abomination. {PP 676.1}
It was told the king that a woman who had a familiar spirit was living in concealment at Endor. This woman had entered into covenant with Satan to yield herself to his control, to fulfill his purposes; and in return, the prince of evil wrought wonders for her and revealed secret things to her. {PP 676.2}
Disguising himself, Saul went forth by night with but two attendants, to seek the retreat of the sorceress. Oh, pitiable sight! the king of Israel led captive by Satan at his will! What path so dark for human feet to tread as that chosen by one who has persisted in having his own way, resisting the holy influences of the Spirit of God! What bondage so terrible as that of him who is given over to the control of the worst of tyrants–himself! Trust in God and obedience to His will were the only conditions upon which Saul could be king of Israel. Had he complied with these conditions throughout his reign, his kingdom would have been secure; God would have been his guide, the Omnipotent his shield. God had borne long with Saul; and although his rebellion and obstinacy had well-nigh silenced the divine voice in the soul, there was still opportunity for repentance. But when in his peril he turned from God to obtain light from a confederate of Satan, he had cut the last tie that bound him to his Maker; he had placed himself fully under the control of that demoniac power which for years had been exercised upon him, and which had brought him to the verge of destruction. {PP 676.3}
Under the cover of darkness Saul and his attendants made their way across the plain, and, safely passing the Philistine host, they crossed the mountain ridge, to the lonely home of the sorceress of Endor. Here the woman with a familiar spirit had hidden herself away that she might secretly continue her profane incantations. Disguised as he was, Saul’s lofty stature and kingly port declared that he was no common soldier. The woman suspected that her visitor was Saul, and his rich gifts strengthened her suspicions. To his request, “I pray thee, divine unto me by the familiar spirit, and bring me him up, whom I shall name unto thee,” the woman answered, “Behold, thou knowest what Saul hath done, how he hath cut off those that have familiar spirits, and the wizards, out of the land: wherefore then layest thou a snare for my life, to cause me to die?” Then “Saul sware to her by the Lord, saying, As the Lord liveth, there shall no punishment happen to thee for this thing.” And when she said, “Whom shall I bring up unto thee?” he answered, “Samuel.” {PP 679.1}
After practicing her incantations, she said, “I saw gods ascending out of the earth. . . . An old man cometh up; and he is covered with a mantle. And Saul perceived that it was Samuel, and he stooped with his face to the ground, and bowed himself.” {PP 679.2}
It was not God’s holy prophet that came forth at the spell of a sorcerer’s incantation. Samuel was not present in that haunt of evil spirits. That supernatural appearance was produced solely by the power of Satan. He could as easily assume the form of Samuel as he could assume that of an angel of light, when he tempted Christ in the wilderness. {PP 679.3}
The woman’s first words under the spell of her incantation had been addressed to the king, “Why hast thou deceived me? for thou art Saul.” Thus the first act of the evil spirit which personated the prophet was to communicate secretly with this wicked woman, to warn her of the deception that had been practiced upon her. The message to Saul from the pretended prophet was, “Why hast thou disquieted me, to bring me up? And Saul answered, I am sore distressed; for the Philistines make war against me, and God is departed from me, and answereth me no more, neither by prophets, nor by dreams: therefore I have called thee, that thou mayest make known unto me what I shall do.” {PP 680.1}
When Samuel was living, Saul had despised his counsel and had resented his reproofs. But now, in the hour of his distress and calamity, he felt that the prophet’s guidance was his only hope, and in order to communicate with Heaven’s ambassador he vainly had recourse to the messenger of hell! Saul had placed himself fully in the power of Satan; and now he whose only delight is in causing misery and destruction, made the most of his advantage, to work the ruin of the unhappy king. In answer to Saul’s agonized entreaty came the terrible message, professedly from the lips of Samuel: {PP 680.2}
“Wherefore then dost thou ask of me, seeing the Lord is departed from thee, and is become thine enemy? And the Lord hath done to him, as he spake by me: for the Lord hath rent the kingdom out of thine hand, and given it to thy neighbor, even to David: because thou obeyedst not the voice of the Lord, nor executedst His fierce wrath upon Amalek, therefore hath the Lord done this thing unto thee this day. Moreover the Lord will also deliver Israel with thee into the hand of the Philistines.” {PP 680.3}
All through his course of rebellion Saul had been flattered and deceived by Satan. It is the tempter’s work to belittle sin, to make the path of transgression easy and inviting, to blind the mind to the warnings and threatenings of the Lord. Satan, by his bewitching power, had led Saul to justify himself in defiance of Samuel’s reproofs and warning. But now, in his extremity, he turned upon him, presenting the enormity of his sin and the hopelessness of pardon, that he might goad him to desperation. Nothing could have been better chosen to destroy his courage and confuse his judgment, or to drive him to despair and self-destruction. {PP 680.4}
Saul was faint with weariness and fasting; he was terrified and conscience-stricken. As the fearful prediction fell upon his ear, his form swayed like an oak before the tempest, and he fell prostrate to the earth. {PP 681.1}
The sorceress was filled with alarm. The king of Israel lay before her like one dead. Should he perish in her retreat, what would be the consequences to herself? She besought him to arise and partake of food, urging that since she had imperiled her life in granting his desire, he should yield to her request for the preservation of his own. His servants joining their entreaties, Saul yielded at last, and the woman set before him the fatted calf and unleavened bread hastily prepared. What a scene!–In the wild cave of the sorceress, which but a little before had echoed with the words of doom–in the presence of Satan’s messenger–he who had been anointed of God as king over Israel sat down to eat, in preparation for the day’s deadly strife. {PP 681.2}
Before the break of day he returned with his attendants to the camp of Israel to make ready for the conflict. By consulting that spirit of darkness Saul had destroyed himself. Oppressed by the horror of despair, it would be impossible for him to inspire his army with courage. Separated from the Source of strength, he could not lead the minds of Israel to look to God as their helper. Thus the prediction of evil would work its own accomplishment. {PP 681.3}