Luke 5:34

The children of the Bridegroom also cannot fast, i. e. refuse nourishment to the soul, but live on every word which proceedeth out of the mouth of God.

(Hom. 30. in Matt.) As if He should say, The present time is one of joy and gladness, sorrow must not then be mixed up with it.

(de Qu. Ev. l. ii. q. 18.) Now there are two fasts, one is in tribulation, to propitiate God for our sins; another in joy, when as carnal things delight us less, we feed the more on things spiritual. The Lord therefore being asked why His disciples did not fast, answered as to each fast. And first of the fast of tribulation; for it follows, And he said unto them, Can ye make the children of the bridegroom fast when the bridegroom is with them? (de Con. Ev. ii. c. 27.) Now this which Luke alone mentions, Ye cannot make the children of the bridegroom fast, is understood to refer to those very men who said that they would make the children of the Bridegroom mourn and fast, since they were about to kill the Bridegroom. (de Qu. Ev. ii. qu. 18.) As if He said, Then shall they be desolate, and in sorrow and lamentation, until the joy of consolation shall be restored to them by the Holy Spirit.

For as long as the Bridegroom is with us we both rejoice, and can neither fast nor mourn. But when He has gone away through our sins, then a fast must be declared and mourning be enjoined.

Or, That fast is not given up whereby the flesh is mortified, and the desires of the body chastened. (For this fast commends us to God.) But we cannot fast who have Christ, and banquet on the flesh and blood of Christ.