And be not conformed to this world: but be transformed by the renewing of your mind, that you may prove what is that good, and acceptable, and perfect, will of God.
All Commentaries on Romans 12:2 Go To Romans 12
John Chrysostom
AD 407
The fashion of this world is groveling and worthless, and temporal as well. It has nothing noble or uplifting about it but is wholly perverted. The second part [of the verse] may mean either that we should be renewed, in order to learn what is expedient for us, or that if we learn what is expedient for us we shall be renewed. Either way, God wills what is expedient for us, and whatever he wills is by definition expedient for us.