Saint Anselm,
Cur Deus Homo — Book Second, Chapter XI
“ If man sinned with ease, is it not fitting for him to atone with difficulty? And if he was overcome by the devil in the easiest manner possible, so as to dishonor God by sinning against him, is it not right that man, in making satisfaction for his sin, should honor God by conquering the devil with the greatest possible difficulty? Is it not proper that, since man has departed from God as far as possible in his sin, he should make to God the greatest possible satisfaction? ”
