For this reason, if I come, I shall not forget his conduct, nor his idle and mischievous talk against us. And he does not stop there: he not only will not receive the brethren, but those who desire to do this he hinders, and excludes them from the Church.

Beloved, do not imitate what is evil, but [imitate] what is good. The one who practices good [exhibiting godly character, moral courage and personal integrity] is of God; the one who practices [or permits or tolerates] evil has not seen God [he has no personal experience with Him and does not know Him at all].