1 Corinthians 9:19-23...
For though I am free from all, I have made myself a servant to all, that I might win more of them. Tothe Jews I became as a Jew, in order to win Jews. To those under the law I became as one under the law (though not being myself under the law) that I might win those under the law. To those outside the law I became as one outside the law (not being outside the law of God but under the law of Christ) that I might win those outside the law. To the weak I became weak, that I might win the weak. I have become all things to all people, that by all means I might save some. I do it all for the sake of the gospel, that I may share with them in its blessings.
Jerram Barrs in The Heart of Evangelism, p185...
Among people of whatever race, culture, or religious background, Paul's desire was to be a servant to them. He would shape his presentation of the message to fit the understanding of his hearers, and his own pattern of living to their patterns of life. Of course, the message itself stayed the same, and Paul never compromised his own obedience to Christ in adapting his lifestyle to that of those he served; yet he presented himself and the Gospel in very different ways to reach very different people. We, too, are to regard ourselves as servants of everyone we meet, so that we also might find opportunities to "save some."