Preach the word; be diligent in season, out of season; reprove, rebuke, exhort with all longsuffering and doctrine.
All Commentaries on 2 Timothy 4:2 Go To 2 Timothy 4
John of Damascus
AD 749
That is to say, do not think its not time to preach, always let it be that time for you, not just in peace or in gladness, nor should you teach only in Church while you are being censored, but even if you are in prison laying in chains, do not cease preaching.