When I am at Rome, I fast on a Saturday: when I am at Milan I do not. Do the same. Follow the custom of the church where you are.

When I am at Rome I fast as the Romans do; when I am at Milan I do not fast. So likewise you, whatever church you come to, observe the custom of the place, if you would neither give offence to others, nor take offence from them.

If you are at Rome live in the Roman style; if you are elsewhere live as they live elsewhere. [Lat., Si fueris Romae, Romano vivito more; Si fueris alibi, vivito sicut ibi.]

When in Rome, live as the Romans do; when elsewhere, live as they live elsewhere.

When I go to Rome, I fast on Saturday, but in Milan I do not. Do you also follow the custom of whatever church you attend, if you do not want to give or receive scandal.

A duty is to be chosen from what is virtuous, and from what is useful, and also from the comparison of the two, one with the other; but nothing is recognized by Christians as virtuous or useful which is not helpful to the future life.