Luke 5:35

"But the days will come when the Bridegroom shall be taken from them." Which are these days in which Christ is taken from us, especially when he himself has said, "I shall be with you, even to the end of the world," when he has said, "I will not leave you orphans"? For it is certain that if he were to leave us, we could not be saved. None can take Christ from you, unless you take yourself away. Your boasting will not take you away, nor arrogance, nor may you presume on the law for yourself. "For he came not to call the righteous, but sinners." … The righteous are those who do not strike him who strikes them, who love their enemy. If we do not endure thus, the opposite is found. "I came not to call the righteous." Christ does not call those who say they are righteous, for not knowing God and seeking to establish their own righteousness, they have not submitted themselves to the righteousness of God. Therefore the usurpers of righteousness are not called to grace. For if grace comes from penitence, surely one who scorns penitence renounces grace. Those who make themselves out to be holy will be wounded. The Bridegroom is taken from them. Neither Caiaphas nor Pilate took Christ from us. We cannot fast, because we have Christ, and we feast on the body and blood of Christ. For how does he who does not hunger seem to fast? How does he who does not thirst seem to fast? Then, how can he who drinks Christ thirst when he himself said, "Whosoever shall drink of the water that I will give him shall be thirsty no more"? Then what follows will declare the saying to concern the fasting of the spirit.

But when are those days, in which Christ shall be taken away from us, since He has said, I will be with you alway, even unto the end of the world? But no one can take Christ away from you, unless you take yourself away from Him.

(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 all things are good in their season, but what is the meaning of the Bridegroom being taken away from them? It is his being taken up into heaven.

Having granted to the children of the Bridegroom that it was not fitting that they should be troubled, as they were keeping a spiritual feast, but that fasting should be abolished among them, He adds as a direction, But the days shall come when the Bridegroom shall be taken from them, and then shall they fast in those days.

And therefore the consolation of the disciples is befitting the presence of the bridegroom Christ, just as also desolation is befitting his absence. On account of which he adds: But the days will come when he will be taken away from them, namely through death and passion: Hosea 5: "They will go to seek the Lord and will not find him: for he has been taken away from them," and then they will fast in those days, namely at that time: because John 16: "You will weep and lament, but the world will rejoice; you indeed will be sorrowful, but your sorrow will be turned into joy"; and then will be the time of sorrow and fasting, whence Tobit 2: "She ate her bread in grief and trembling, recalling that prophetic word: Your feast days will be turned into mourning"; Lamentations 1: "Therefore I am weeping, and my eye flows with tears, because the comforter who would restore my soul has become far from me."