My soul, O my soul, rise up! Why are you sleeping? The end draws near, and soon you will be troubled. Watch, then, that Christ your God may spare you, for He is everywhere present and fills all things.
From the Great Canon of Andrew of Crete
Wisdom from the Church Fathers
Virtues and vices are the food of the soul and it can feed on either one, turning to whichever one it wants. If it is bent toward moral excellence, it will be fed by virtue - by righteousness, temperance, meekness, endurance. In other words, it is just as St. Paul says, 'being nourished by the word of truth' (1 Tim. 4:6).