Christ must needs be true God, seeing he, through himself, fulfilled and overcame the law; for most certain it is, that no one else could have vanquished the law, angel or human creature, but Christ only, so that it cannot hurt those that believe in him; therefore, most certainly he is the Son of God, and natural God. Now if we comprehend Christ in this manner, as the Holy Scripture displays him before us, then certain it is, that we can neither err nor be put to confusion; and may then easily judge what is right to be held of all manner of divine qualities, religion, and worship, that are used and practiced in the universal world. Were this picturing of Christ removed out of our sight, or darkened in us undeniably there must needs follow utter disorder. For human and natural religion, wisdom, and understanding, cannot judge aright or truly of the laws of God; therein has been and still is exhausted the art of all philosophers, of all the learned and worldly-wise among he children of men. For the law rules and govern mankind; therefore the law judges mankind, and not mankind the law.
Martin Luther, from Tabletalk, pages 163-164