“If, without keeping the commandments, it be possible to attain unto life by faith only, how can it be true that the Lord will say to such as He shall have set on His left hand: “Depart from Me, ye cursed, into everlasting fire, prepared for the devil and his angels?” He rebukes them, not because they have not believed in Him, but because they have not done good works.”
(St Augustine, ‘On Faith and Works’)