To them that are without law, as without law, (being not without law to God, but under the law of Christ,) that I might gain them that are without law.
All Commentaries on 1 Corinthians 9:21 Go To 1 Corinthians 9
Augustine of Hippo
AD 430
He did this by compassion, not by lying. For each one becomes like him whom he wants to help when such great mercy prevails as that each one would wish for himself if he were in the same misery. And so he becomes like the other—not by deceiving him but by putting himself in the other’s place.