1 Corinthians 2:4-5

2:4 My conversation and my preaching were not with persuasive words of wisdom, but with a demonstration of the Spirit and of power, 2:5 so that your faith would not be based on human wisdom but on the power of God.

1 Corinthians 2:13

2:13 And we speak about these things, not with words taught us by human wisdom, but with those taught by the Spirit, explaining spiritual things to spiritual people.