1 Corinthians 9:24–27
24 Do you not know that in a race all the runners run, but only one receives the rprize? So srun that you may obtain it. 25 Every tathlete exercises self-control in all things. They do it to receive a perishable uwreath, but we an vimperishable. 26 So I do not run aimlessly; I do not box as one beating the air. 27 But I discipline my body and keep it under control,1 lest after preaching to others I myself should be wdisqualified.
1 Corinthians 15:58
58 Therefore, my beloved brothers, be fsteadfast, immovable, always abounding in the gwork of the Lord, knowing that in the Lord your labor is not in vain.