""When the article of justification has fallen, everything has fallen. Therefore it is necessary constantly to inculcate and impress it, as Moses says of his Law (Deut. 6:7); for it cannot be inculcated and urged enough or too much. Indeed, even though we learn it well and hold to it, yet there is no one who apprehends it perfectly or believes it with a full affection and heart. So very trickish is our flesh, fighting as it does against the obedience of the spirit.” Martin Luther