2 Corinthians 2:17

2:17 For we are not like so many others, hucksters who peddle the word of God for profit, but we are speaking in Christ before God as persons of sincerity, as persons sent from God.

2 Corinthians 10:10-11

10:10 because some say, “His letters are weighty and forceful, but his physical presence is weak and his speech is of no account.” 10:11 Let such a person consider this: What we say by letters when we are absent, we also are in actions when we are present.