When we sow something, we do it in expectation of growth in that which we have sown. It is this growth that we reap. The process of growing and harvesting crops is one with which readers of scripture both past and present would be familiar. We know that when we sow certain crops, we reap a useful harvest: a yield of grain heads to create meal, for instance, which can provide food for the community.
Sow the wind and reap whirlwind
Other Proverbs
Gallina vieja hace buen caldo
Haciendo y deshaciendo se va aprendiendo
Si hay trato, pueden ser amigos perro y gato
El tiempo todo lo cura