The one who comes from above is above all. The one who is of the earth is earthly and speaks of earthly things. But the one who comes from heaven (is above all). He testifies to what he has seen and heard, but no one accepts his testimony. Whoever does accept his testimony certifies that God is trustworthy. For the one whom God sent speaks the words of God. He does not ration his gift of the Spirit. The Father loves the Son and has given everything over to him. Whoever believes in the Son has eternal life, but whoever disobeys the Son will not see life, but the wrath of God remains upon him. (Jn 3:31-36)
The author is contrasting the one from above with the one who is of the earth. The one from above is certainly Jesus. But who is the one who is of the earth. I am sure the author here speaks of the plenty of people whose thinking and doing are from the earth. The people of the earth often competed with the one from above. They went to the extend of even rejecting the things from above.
The people from the earth do not trust what is from above and the result is destruction. This is not because the one who is above, that is God, is a tyrant but the road chosen by the people of the earth is only leading to destruction and decay. It is the choice of the man that takes him to evil and not the anger of God.
But the one who is from above speaks only of heavenly things. What he speaks is the word of God and not earthly and he brings the gift of God. The gift is the eternal life. This gift is given only to those who believe in the Son. Anyone who does not accept the Son is choosing a life of destruction which in tern seems to be the wrath of God. But the choice of the man.
