2 Corinthians 10:10

Because, The letters, he says, are indeed weighty and powerful, but his bodily presence is weak, and his speech is disdained.

1 Corinthians 1:17

For Christ sent me not to immerse, but to preach the good-news, not in wisdom of speech lest the cross of Christ would be emptied.

2 Corinthians 11:6

But even if I am unskilled in speech, yet not in knowledge, but in everything made known in all things to you.

Galatians 4:13-14

But ye know that through a weakness of the flesh I preached the good-news to you the first time.

Exodus 4:10

And Moses said to LORD, Oh, LORD, I am not eloquent, neither heretofore, nor since thou have spoken to thy servant, for I am slow of speech, and of a slow tongue.

Jeremiah 1:6

Then I said, Ah, lord LORD! Behold, I know not how to speak, for I am a child.

1 Corinthians 1:21

For since in the wisdom of God the world did not know God through its wisdom, it pleased God through the foolishness of preaching to save those who believe.

1 Corinthians 2:1-4

And I, brothers, when I came to you, came not in eminence of speech or of wisdom proclaiming the testimony of God to you.

2 Corinthians 10:1

Now I Paul myself entreat you by the meekness and gentleness of Christ, who indeed am lowly in presence among you, but am bold toward you when absent.

2 Corinthians 12:5-9

For such a man I will boast, but for myself I will not boast, except in my weaknesses.

Treasury of Scripture Knowledge

Summary

For his letters, say they, are weighty and powerful; but his bodily presence is weak, and his speech contemptible.

Bible References

Say they

2 Corinthians 10:11
Let such a man think this, that such kind we are in word by letters when absent, we are also such kind when present in the work.

But

2 Corinthians 10:1
Now I Paul myself entreat you by the meekness and gentleness of Christ, who indeed am lowly in presence among you, but am bold toward you when absent.
2 Corinthians 12:5
For such a man I will boast, but for myself I will not boast, except in my weaknesses.
1 Corinthians 2:3
And I was with you in weakness, and in fear, and in much trembling.
Galatians 4:13
But ye know that through a weakness of the flesh I preached the good-news to you the first time.

And his

2 Corinthians 11:6
But even if I am unskilled in speech, yet not in knowledge, but in everything made known in all things to you.
Exodus 4:10
And Moses said to LORD, Oh, LORD, I am not eloquent, neither heretofore, nor since thou have spoken to thy servant, for I am slow of speech, and of a slow tongue.
Jeremiah 1:6
Then I said, Ah, lord LORD! Behold, I know not how to speak, for I am a child.
1 Corinthians 1:17
For Christ sent me not to immerse, but to preach the good-news, not in wisdom of speech lest the cross of Christ would be emptied.
1 Corinthians 2:1
And I, brothers, when I came to you, came not in eminence of speech or of wisdom proclaiming the testimony of God to you.

General references

1 Corinthians 1:27
But God chose the foolish things of the world, so that he might humiliate the wise, and God chose the weak things of the world, so that he might humiliate the powerful.
1 Corinthians 2:3
And I was with you in weakness, and in fear, and in much trembling.