1 Corinthians 2:2

And I, brethren, when I came to you, came not with excellency of speech or of wisdom, declaring unto you the testimony of God.

And I was with you in weakness, and in fear, and in much trembling.

And my speech and my preaching was not with enticing words of man's wisdom, but in demonstration of the Spirit and of power:

That your faith should not stand in the wisdom of men, but in the power of God.