Psalms 102:4

I am smitten like grass, and my heart is withered. Just as it is also written elsewhere: 'Man, his days are like grass.' For such is the life of men: it is green, and quickly it withers. Because I have forgotten to eat my bread. He did not say, I had no desire to eat, or I despised eating. To such a degree did the memory of my sins come upon me, and such penance did I do, that I even forget to eat, having my longing set on God, and considering him alone.

"For I forgot to eat my bread. At the sound of my groaning, my bones stuck to my flesh." I lost appetite for any food, and was completely bereft of my former good condition, my body being consumed by the wasting of discouragement; I am but skin and bones. The word of God, then, is our soul's bread: just as ordinary bread nourishes the body, so the word from heaven [nourishes] the soul's substance. In passing on the prayer, Christ said as much to the apostles, "Give us this day our daily bread." So whoever forgets to eat it, that is, to be active (action, after all, constituting the eating of the spiritual bread, as is clear from the saying of the Lord to the apostles, "Be active, not for the eating, which perishes, but for that which endures to life eternal"), this one's heart is stricken and dried up like hay. How does hay get stricken and dry up? When rain stops falling on it. As the heart, too, when suffering from a dearth of the word, is then stricken and dries up, the flower of virtue no longer has the strength to bloom.

Look back to Adam, whence the human race sprung. For how but from him was misery propagated? whence but from him is this hereditary poverty? Let him then, who in his own body was at one time in despair, now that he is set in Christ's body, say with hope, "My heart is smitten down, and withered like grass" (ver. 4). Deservedly, since all flesh is grass. But how did this happen unto thee? "Since I have forgotten to eat my bread." For God had given His commandment for bread. For what is the bread of the soul? The serpent suggesting, and the woman transgressing, he touched the forbidden fruit, he forgot the commandment: his heart was smitten as it deserved, and withered like grass, since he forgot to eat his bread. Having forgotten to eat bread, he drinketh poison: his heart is smitten, and withered like grass. ...Now eat that bread which thou hadst forgotten. But this very Bread hath come, in whose body thou mayest remember the voice of thy forgetfulness, and cry out in thy poverty, so that thou mayest receive riches. Now eat: for thou art in His body, who saith, "I am the living bread which came down from heaven." Thou hadst forgotten to eat thy bread; but after His crucifixion, "all the ends of the earth shall be reminded, and be converted unto the Lord." After forgetfulness, let remembrance come, let bread be eaten from heaven, that we may live; not manna, as they did eat, and died; that bread, of which it is said, "Blessed are they who hunger and thirst after righteousness."