1 Corinthians 9:19-27

¹⁹ For though I am free from all people, I have made myself a slave to all, so that I may gain more. ²⁰ To the Jews I became as a Jew, so that I might gain Jews; to those who are under the Law, I became as one under the Law, though not being under the Law myself, so that I might gain those who are under the Law; ²¹ to those who are without the Law, I became as one without the Law, though not being without the law of God but under the law of Christ, so that I might gain those who are without the Law. ²² To the weak I became weak, that I might gain the weak; I have become all things to all people, so that I may by all means save some. ²³ I do all things for the sake of the gospel, so that I may become a fellow partaker of it.

²⁴ Do you not know that those who run in a race all run, but onlyone receives the prize? Run in such a way that you may win.²⁵ Everyone who competes in the games exercises self-control in all things. So they do it to obtain a perishable wreath, but we an imperishable. ²⁶ Therefore I run in such a way as not to runaimlessly; I box in such a way, as to avoid hitting air; ²⁷ but I strictly discipline my body and make it my slave, so that, after I have preached to others, I myself will not be disqualified.