To the end then, that when we have gone through the labour of fasting, we forfeit not the crown of fasting, we should understand how, and after what manner, it is necessary to conduct this business; since that Pharisee also fasted, but afterwards went down empty, and destitute of the fruit of fasting.
-St. John Chrysostom, Homily III, 4th Century


The Publican fasted not; and yet he was accepted in preference to him who had fasted; in order that thou mayest learn that fasting is unprofitable, except all other duties follow with it.
-St. John Chrysostom, Homily III, 4th Century