Fasting with the Apostles

“After the long Feast of Pentecost, fasting is especially necessary to purify our thoughts and render us worthy to receive the Gifts of the Holy Spirit … Therefore, the salutary custom was established of fasting after the joyful days during which we celebrated the resurrection and ascension of our Lord, and the coming of the Holy Spirit” (from a sermon of Pope St. Leo the Great, +461).