1 Corinthians 2:1; 1 Corinthians 2:4; 1 Corinthians 2:13

1 And I, when I came to you, brothers,did not come proclaiming to you the testimony of God with lofty speech or wisdom.

4 and my speech and my message were not in plausible words of wisdom, but in demonstration of the Spirit and of power,

13 And we impart this in words not taught by human wisdom but taught by the Spirit, interpreting spiritual truths to those who are spiritual.