Luke 6:21

(Hom. de Grat. act.) But He promises laughing to those who weep; not indeed the noise of laughter from the mouth, but a gladness pure and unmixed with aught of sorrow.

(de Beat. orat. 4.) But in a deeper sense, as they who partake of bodily food vary their appetites according to the nature of the things to be eaten; so also in the food of the soul, by some indeed that is desired which depends upon the opinion of men, by others, that which is essentially and of its own nature good. Hence, according to Matthew, men are blessed who account righteousness in the place of food and drink; by righteousness I mean not a particular but an universal virtue, which he who hungers after is said to be blessed. (ubi sup.) For to those who hunger and thirst after righteousness He promises abundance of the things they desire. For none of the pleasures which are sought in this life can satisfy those who pursue them. But the pursuit of virtue alone is followed by that reward, which implants a joy in the soul that never faileth.

(Hom. 18. ad pop. Ant.) But godly sorrow is a great thing, and it worketh repentance to salvation. Hence St. Paul when he had no failings of his own to weep for, mourned for those of others. Such grief is the source of gladness, as it follows, For ye shall laugh. For if we do no good to those for whom we weep, we do good to ourselves. For he who thus weeps for the sins of others, will not let his own go unwept for; but the rather he will not easily fall into sin. Let us not be ever relaxing ourselves in this short life, lest we sigh in that which is eternal. Let us not seek delights from which flow lamentation, and much sorrow, but let us be saddened with sorrow which brings forth pardon. We often find the Lord sorrowing, never laughing.

After having commanded them to embrace poverty, He then crowns with honour those things which follow from poverty. It is the lot of those who embrace poverty to be in want of the necessaries of life, and scarcely to be able to get food. He does not then permit His disciples to be fainthearted on this account, but says, Blessed are ye who hunger now. But poverty is followed not only by a want of those things which bring delight, but also by a dejected look, because of sorrow. Hence it follows, Blessed are ye that weep. He blesses those who weep, not those who merely drop tears from their eyes, (for this is common to the believing and unbelieving, when sorrow befals them,) but rather He calls those blessed, who shun a careless life, mixed up with sin, and devoted to carnal pleasures, and refuse enjoyments almost weeping from their hatred of all worldly things.

That is, blessed are ye who chasten your body and subject it to bondage, who in hunger and thirst give heed to the word, for then shall ye receive the fulness of heavenly joys.