1 Corinthians 9:20-22

20To the Jews I became like a Jew, to win the Jews. To those under the law I became like one under the law (though I myself am not under the law), to win those under the law. 21To those without the law I became like one without the law (though I am not outside the law of God but am under the law of Christ), to win those without the law. 22To the weak I became weak, to win the weak. I have become all things to all people so that by all possible means I might save some.