Athanasius of Alexandria

Therefore, when we come to the feast, we must not treat it as the shadows and pictures that Israel had, for they are fulfilled. Nor should we come to it as we would any ordinary secular feast. Oh, no! Let us go quickly to the Lord, who is himself the feast. We must not look at the feast as a time to delight the appetite and overindulge but as a display of virtue. The feasts of the heathen are made up of laziness and greed. They think idleness is the mark of a feast, and when they feast they do the despicable acts of death and hell. Our feasts, on the other hand, are scenes of virtuous activities and the practice of temperance. The prophetic word says it very clearly, “The fasts of the fourth, fifth, seventh and tenth months shall become feasts of joy and gladness for the house of Judah.”