1 Corinthians 9:19-22

For though I was free from all men, I brought myself under bondage to all, that I might gain the more. And to the Jews I became as a Jew, that I might gain Jews; to them that are under the law, as under the law, not being myself under the law, that I might gain them that are under the law; to them that are without law, as without law, not being without law to God, but under law to Christ, that I might gain them that are without law. To the weak I became weak, that I might gain the weak: I am become all things to all men, that I may by all means save some.