1 Timothy 4:7

7Exercise thyself to godliness (74) After having instructed him as to doctrine, what it ought to be, he now also admonishes him what kind of example he ought to give to others. He says, that he ought to be employed in “godliness;” for, when he says, Exercise thyself, he means that this is his proper occupation, his labor, his chief care. As if he had said, “There is no reason why you should weary yourself to no purpose about other matters; you will do that which is of the highest importance, if you devote yourself, with all your zeal, and with all your ability, to godliness alone.” By the word godliness, he means the spiritual worship of God which consists in purity of conscience; which is still more evident from what follows, when it is contrasted with bodily exercise.