1 Corinthians 2:1-5

When I came to you, my friends, to preach God's secret truth, I did not use big words and great learning. For while I was with you, I made up my mind to forget everything except Jesus Christ and especially his death on the cross. So when I came to you, I was weak and trembled all over with fear, and my teaching and message were not delivered with skillful words of human wisdom, but with convincing proof of the power of God's Spirit. Your faith, then, does not rest on human wisdom but on God's power.