Romanos 12:2

Be not conformed to this world; to its sinful spirit, maxims, customs, and habits.

Transformed; changed, not in outward conduct merely, but in the spirit and temper of your minds.

May prove; know and discern aright by your own experience. The apostle has in view that discernment of God's will which comes from actual obedience. Compare Juan 7:17. The doctrines of the gospel as inculcated by the apostles, especially justification by grace through faith in Jesus Christ, are not only consistent with, but conducive to the more pure, elevated, and universal morality; and the intelligent, cordial belief of the one will, through the grace of God, secure the other.