If thou dost fast from food, my soul, yet dost not cleanse thyself from passions, thou dost rejoice in vain over thine abstinence. For if thy purpose is not turned towards amendment of life, as a liar thou art hateful in God’s sight, and thou dost resemble the evil demons who never eat at all. Do not by sinning make the fast worthless, but firmly resist all wicked impulses. Picture to thyself that thou art standing beside the crucified Savior or rather, that thou art thyself crucified with Him who was crucified for thee; and cry out to Him: Remember me, O Lord, when Thou comest in Thy Kingdom.
— Aposticha from Orthros (Tuesday of Cheese Week)
Thanks to FWD from Fr Josiah Trenham.