Luther

As I have said, therefore, any Christian is a supreme pontiff, because, first, he offers and slaughters his reason and the mind of the flesh, and, secondly, he attributes to God the glory of being righteous, truthful, patient, kind, and merciful. This is the continuous evening and morning sacrifice in the New Testament. The evening sacrifice is to kill the reason, and the morning sacrifice is to glorify God. Thus a Christian is involved, daily and perpetually, in this double sacrifice and in its practice. No one can adequately proclaim the value and the dignity of Christian sacrifice.—Great Galatians