8. For the next words are, "They that sow in tears, shall reap in joy"(ver. 5). In this life, which is full of tears, let us sow. What shall we sow? Good works. Works of mercy are our seeds: of which seeds the Apostle saith, "Let us not be weary in well doing; for in due season we shall reap if we faint not." Speaking therefore of almsgiving itself, what saith he? "This I say; he that soweth sparingly, shall reap also sparingly." He therefore who soweth plentifully, shall reap plentifully: he who soweth sparingly, shall reap also sparingly: and he that soweth nothing, shall reap nothing. Why do ye long for ample estates, where ye may sow plentifully? There is not a wider field on which ye can sow than Christ, who hath willed that we should sow in Himself. Your soil is the Church; sow as much as ye can. But thou hast not enough to do this. Hast thou the will? As what thou hadst would be nothing, if thou hadst not a good will; so do not despond, because thou hast not, if thou hast a good...
Joy. This was the case of the martyrs, (Luke vi. 21., and John xvi. 20.) as well as of the captives, Jeremias xxxi. 9., Isaias lxvi. 10., and Baruch v. 6. (Calmet)
Tribulation commonly attends the virtuous in this life. Their reward is reserved for the next. (St. Augustine) (Worthington)
Sowing, we know not whether we shall ever reap. (Haydock)
This is a sort of proverb, which is applied to the captives. (Berthier)