John Chrysostom

(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.