Catena Aurea

GREGORY OF NYSSA. (in Eccles. Hom. 5.) Virtue then is not sustained by bread, nor by flesh does the soul keep itself in health and vigour, but by other banquets than these is the heavenly life fostered, and increased. The nourishment of the good man is chastity, his bread, wisdom, his herbs, justice, his drink, freedom from passion, his delight, (εὐφροσύνη quasi ex εὐφρόνειν) to be rightly wise.

AMBROSE. You see then what kind of arms He uses to defend man against the assaults of spiritual wickedness, and the allurements of the appetite. He does not exert His power as God, (for how had that profited me,) but as man He summons to Himself a common aid, that while intent upon the food of divine reading He may neglect the hunger of the body, and gain the nourishment of the word. For he who seeks after the word cannot feel the want of earthly bread; for divine things doubtless make up for the loss of human. At the same time by saying, Man lives not by bread alone, He shews that man was tempted, that is, our flesh which He assumed, not His own divinity.