testifies to what he has seen and heard, and no one accepts his testimony.
In context
30He must grow greater; I must grow less. 31The one who comes from above is above all. Whoever is of the earth belongs to the earth and speaks of earthly things. The one who comes from heaven 32testifies to what he has seen and heard, and no one accepts his testimony. 33Whoever does accept his testimony has put his seal to this: God is true. 34For the one God has sent speaks the words of God, for he does not give the Spirit by measure.
