1 Corinthians 9:21-23

21To those free from the law I became like one free from the law (though I am not free from God’s law but under the law of Christ) to gain those free from the law.

22To the weak I became weak in order to gain the weak. I have become all things to all people, so that by all means I may save some.

23I do all these things because of the gospel, so that I can be a participant in it.