1 Corinthians 9:21-23

21to those without law, as without law, (not as without law to 1God, but as legitimately subject to Christ,) in order that I might gain [those] without law.

22I became to the weak, [as] weak, in order that I might gain the weak. To all I have become all things, in order that at all events I might save some.

23And I do all things for the sake of the glad tidings, that I may be fellow-partaker with them.