2 Timothy 2:2-5

The things [the doctrine, the precepts, the admonitions, the sum of my ministry] which you have heard me teach in the presence of many witnesses, entrust [as a treasure] to reliable and faithful men who will also be capable and qualified to teach others. Take with me your share of hardship [passing through the difficulties which you are called to endure], like a good soldier of Christ Jesus. No soldier in active service gets entangled in the [ordinary business] affairs of civilian life; [he avoids them] so that he may please the one who enlisted him to serve. And if anyone competes as an athlete [in competitive games], he is not crowned [with the wreath of victory] unless he competes according to the rules.