1 Corinthians 9:19-23 (NIV)

"Though I am free and belong to no man, I make myself a slave to everyone, to win as many to possible. To the Jews I became 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), so as to win those under the law. To those not having the law I became like one not having the law (thought I am not free from God's law but am under Christ's law), so as to win those not having the law. To the weak I became weak, to win the weak. I have become all things to all me so that by all possible means I might save some. I do all this for the sake of the gospel, that I ma share in its blessings.