1 Corinthians 2:2-5

For I decided that while I was with you I would forget everything except Jesus Christ, the one who was crucified. I came to you in weakness—timid and trembling. And my message and my preaching were very plain. Rather than using clever and persuasive speeches, I relied only on the power of the Holy Spirit. I did this so you would trust not in human wisdom but in the power of God.