...for bodily discipline is only of little profit, but godliness is profitable for all things, since it holds promise for the present life and also for the life to come. It is a trustworthy statement deserving full acceptance. For it is for this we labor and strive, because we have fixed our hope on the living God, who is the Savior of all men, especially of believers. Prescribe and teach these things. 

1 Tim 4:8-11   (NASB)