1 Corinthians 9:19-23
"Though I am free and belong to no man, I make myself a slave to everyone, to win as many as possible. To 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 but am under Christ's law), so as to win those under the law. To the weak, I became weak, to win the weak. I have become all things to all men so that by all possible means I might save some. I do this all for the sake of the gospel that I may share in its blessings."