For the one who sows to his own flesh will from the flesh reap corruption, but the one who sows to the Spirit will from the Spirit reap eternal life.
And let us not grow weary of doing good, for in due season we will reap, if we do not give up. (Galatians 6:8-9)
Do you not know that in a race all the runners run, but only one gets the prize? Run in such a way as to get the prize.
Everyone who competes in the games goes into strict training. They do it to get a crown that will not last, but we do it to get a crown that will last forever.
Therefore I do not run like someone running aimlessly; I do not fight like a boxer beating the air.
No, I strike a blow to my body and make it my slave so that after I have preached to others, I myself will not be disqualified for the prize. (1 Corinthians 9:24-27)