King James Version
But though I be rude in speech, yet not in knowledge; but we have been throughly made manifest among you in all things.English Standard Version
Even if I am unskilled in speaking, I am not so in knowledge; indeed, in every way we have made this plain to you in all things.New International Version
I may not be a trained speaker, but I do have knowledge. We have made this perfectly clear to you in every way.