1 Corinthians 2:2-7

YLT(i) 2 for I decided not to know any thing among you, except Jesus Christ, and him crucified; 3 and I, in weakness, and in fear, and in much trembling, was with you; 4 and my word and my preaching was not in persuasive words of human wisdom, but in demonstration of the Spirit and of power— 5 that your faith may not be in the wisdom of men, but in the power of God.
6 And wisdom we speak among the perfect, and wisdom not of this age, nor of the rulers of this age—of those becoming useless, 7 but we speak the hidden wisdom of God in a secret, that God foreordained before the ages to our glory,