“The trees of the LORD are full of sap.”
The “sap” of the kingdom of God is the Spirit, and every tree that God plants in His kingdom is full of it. This is why Paul said, “If anyone does not have the Spirit of Christ, he does not belong to him” (Rom. 8:9). And it is also why I warn everyone that no one is born again until he receives the holy Ghost (with the evidence of speaking in other tongues). Do not believe the man who tells you otherwise! Jesus said, “Every plant that my heavenly Father did not plant will be uprooted. Leave them! They are blind guides of blind people. And if the blind lead the blind, both will fall into a pit” (Mt. 15:13–14). Do you want to fall into the pit with a blind man? Just repent and let God plant you in His kingdom!
If God has not given you His sap, you do not have any and you do not belong to Him. But those He plants in His kingdom are filled with His sap, and no one can ever take it from them.