The Greek preparatory culture, therefore, with philosophy itself, is shown to have come down from God to men, not with a definite direction but in the way in which showers fall down on the good land, and on the dunghill, and on the houses. And similarly both the grass and the wheat sprout; and the figs and any other reckless trees grow on sepulchres. And things that grow, appear as a type of truths. For they enjoy the same influence of the rain. But they have not the same grace as those which spring up in rich soil, inasmuch as they are withered or plucked up. And here we are aided by the parable of the sower, which the Lord interpreted. For the husbandman of the soil which is among men is one; He who from the beginning, from the foundation of the world, sowed nutritious seeds; He who in each age rained down the Lord, the Word. But the times and places which received [such gifts], created the differences which exist. Further, the husbandman sows not only wheat (of which there are many varieties), but also other seeds—barley, and beans, and peas, and vetches, and vegetable and flower seeds. And to the same husbandry belongs both planting and the operations necessary in the nurseries, and gardens, and orchards, and the planning and rearing of all sorts of trees.