"Everyone who drinks of this water will thirst again; but whoever drinks of the water that I will give him shall never thirst;..." John 4:13-14
But the Spirit explicitly says that in later times some will fall away from the faith, paying attention to deceitful spirits and doctrines of demons, 1 Timothy 4:1
Jesus\' teaching on the Holy Spirit in the upper room discourse. John 13-17
"By common confession, great is the mystery of godliness..." 1 Timothy 3:16