NET
10 because some say, “His letters are weighty and forceful, but his physical presence is weak and his speech is of no account.”
Darby
10 because his letters, he says, [are] weighty and strong, but his presence in the body weak, and his speech naught.
KJV
10 For [his] letters, say they, [are] weighty and powerful; but [his] bodily presence [is] weak, and [his] speech contemptible.