2 Corinthians 10:10
for his letters, say they, are weighty and powerful, but his bodily presence is weak, and his speech contemptible.
1 Corinthians 1:17
For Christ sent me not to baptize, but to preach the gospel: not in fine speech, least the cross of Christ should be made of no effect.
2 Corinthians 11:6
yet not in knowledge ---but we have been fully manifested among you in all things.
Galatians 4:13-14
But ye know that in the infirmity of the flesh I preached the gospel to you at first:
1 Corinthians 1:21
For, since in the wisdom of God the world by it's wisdom knew not God, it pleased God by what they called the folly of preaching to save those that believe.
1 Corinthians 2:1-4
And I, when I came among you, brethren, came not with excellency of language, or of human wisdom, declaring unto you the testimony of God:
2 Corinthians 10:1
Now I Paul myself exhort you, by the meekness and lenity of Christ, who in presence am lowly among you,
2 Corinthians 12:5-9
Of such a one I will boast; but of myself I will not boast, unless in my infirmities.