But though I be rude in speech, yet not in knowledge; but we have been throughly made manifest among you in all things. 2 Corinthians 11:6
When Paul admitted, according to the KJV, that he was "rude in speech," it did not mean that he was rough, unrefined, boorish, or discourteous. The word "rude" here goes back to Tyndale, and has the now rare and archaic meaning of inexpert, unskilled. It translates the Greek term idiotes . What Paul grants is that he is not a professional orator.