1 Cor. 9:19-2219For though I be free from all men, yet have I made myself servant unto all, that I might gain the more. 20And unto the Jews I became as a Jew, that I might gain the Jews; to them that are under the law, as under the law, that I might gain them that are under the law; 21To them that are without law, as without law, (being not without law to God, but under the law to Christ,) that I might gain them that are without law. 22To the weak became I as weak, that I might gain the weak: I am made all things to all men, that I might by all means save some. (1 Corinthians 9:19‑22)
"For though I be free from all men, yet have I made myself servant unto all, that I might gain the more. And unto the Jews I became as a Jew, that I might gain the Jews; to them that are under the law, as under the law, that I might gain them that are under the law; to them that are without law, as without law, (being not without law to God, but under the law to Christ,) that I might gain them that are without law. To the weak became I as weak, that I might gain the weak: I am made all things to all men, that I might by all means save some."
This teaches us the exquisite lesson of self-denial in order to meet the condition of others with a direct view to their salvation. This passage is frequently used for the direct opposite; namely, for self-indulgence, and mixing ourselves up with all sorts of wrong things, under the plea of being "all things to all men"; and in result, instead of gaining them and delivering them out of the evil and folly in which they are involved, we fall under the power of these things ourselves, to the great dishonor of our Lord and the serious damage of souls.