1 Samuel 28:8 So Saul disguised himself and put on other garments and went, he and two men with him. And they came to the woman by night. And he said, “Divine for me by a spirit and bring up for me whomever I shall name to you.” The woman said to him, “Surely you know what Saul has done, how he has cut off the mediums and the necromancers from the land. Why then are you laying a trap for my life to bring about my death?” But Saul swore to her by the Lord, “As the Lord lives, no punishment shall come upon you for this thing.” Then the woman said, “Whom shall I bring up for you?” He said, “Bring up Samuel for me.” When the woman saw Samuel, she cried out with a loud voice. And the woman said to Saul, “Why have you deceived me? You are Saul.” The king said to her, “Do not be afraid. What do you see?” And the woman said to Saul, “I see a god coming up out of the earth.” He said to her, “What is his appearance?” And she said, “An old man is coming up, and he is wrapped in a robe.” And Saul knew that it was Samuel, and he bowed with his face to the ground and paid homage.
Then Samuel said to Saul, “Why have you disturbed me by bringing me up?” Saul answered, “I am in great distress, for the Philistines are warring against me, and God has turned away from me and answers me no more, either by prophets or by dreams. Therefore I have summoned you to tell me what I shall do.” And Samuel said, “Why then do you ask me, since the Lord has turned from you and become your enemy? The Lord has done to you as he spoke by me, for the Lord has torn the kingdom out of your hand and given it to your neighbor, David. Because you did not obey the voice of the Lord and did not carry out his fierce wrath against Amalek, therefore the Lord has done this thing to you this day. Moreover, the Lord will give Israel also with you into the hand of the Philistines, and tomorrow you and your sons shall be with me. The Lord will give the army of Israel also into the hand of the Philistines.” Then Saul fell at once full length on the ground, filled with fear because of the words of Samuel.
1 Samuel 18:12 Saul was afraid of David because the LORD was with him but had departed from Saul.
Judges 16:20 And she said, “The Philistines are upon you, Samson!” And he awoke from his sleep and said, “I will go out as at other times and shake myself free.” But he did not know that the LORD had left him.
Psalms 51:11 Cast me not away from your presence, and take not your Holy Spirit from me.
Hosea 9:12 Woe to them when I depart from them!
Proverbs 14:14 The backslider in heart will be filled with the fruit of his ways,
Jeremiah 2:17-18 Have you not brought this upon yourself by forsaking the LORD your God, when he led you in the way?
Charles Ryrie – The Spirit leaving Saul here is God removing His blessing on Saul as king of Israel. He gives His Spirit to David, the man He has chosen to replace Saul as king. The removal of the Spirit from one and the giving of the Spirit to the other was God’s supernatural declaration that the throne had been taken from Saul and given to David. Saul may cling to His crown for a time, but God was no longer with him nor blessing his leadership. Israel had a new shepherd. God had raised up a new leader for his people. David was now God’s chosen king.
Prior to Christ’s death, resurrection, and ascension into heaven, the Holy Spirit had a “come and go” relationship with people. The Holy Spirit indwelt King Saul, but then departed from him. Instead, the Spirit came upon David. After his adultery with Bathsheba, David feared that the Holy Spirit would be taken from him. The Holy Spirit filled to enable him to produce the items needed for the tabernacle, but this is not described as a permanent relationship. All of this changed after Jesus’ ascension into heaven. Beginning on the day of Pentecost, the Holy Spirit began permanently indwelling believers. The permanent indwelling of the Holy Spirit is the fulfillment of God’s promise to always be with us and never forsake us.
While the Holy Spirit will never leave a believer, it is possible for our sin to “quench the Holy Spirit” or “grieve the Holy Spirit”. Sin always has consequences in our relationship with God. While our relationship with God is secure in Christ, unconfessed sin in our lives can hinder our fellowship with God and effectively quench the Holy Spirit’s working in our lives. That is why it is so important to confess our sins because God is “faithful and just and will forgive us our sins and purify us from all unrighteousness”. So, while the Holy Spirit will never leave us, the benefits and joy of His presence can, in fact, depart from us.