John Chrysostom

(Hom. xxxiv. 2) Again, He distinguishes earthly from heavenly things, for as above He said of the water, that he who drank of it should never thirst, so here He says, He that reapeth gathereth fruit unto life eternal; adding, that both he that soweth and he that reapeth may rejoice together. The Prophets sowed, the Apostles reaped, yet are not the former deprived of their reward. For here a new thing is promised; viz. that both sowers and reapers shall rejoice together. How different this from what we see here. Now he that soweth grieveth because he soweth for others, and he only that reapeth rejoiceth. But in the new state, the sower and reaper share the same wages.