Is it possible for God to remove His Spirit from us, as David feared? "Now He who prepared us for this very purpose is God, who gave to us the Spirit as a pledge."

"In Him, you also, after listening to the message of truth, the gospel of your salvation-having also believed, you were sealed in Him with the Holy Spirit of promise, who is given as a pledge of our inheritance, with a view to the redemption of God's own possession, to the praise of His glory." -2 Cor. 5:5 & Eph. 1:13-14

Psalm 51:1 and Psalm 51:11