These are the two objects which a cultivation of the land must attain to and take care of, the cultivation of the land and the safe keeping of the things which are in it, otherwise it will be spoiled by laziness or else by devastation. But although the Paradise did not stand in need of these exertions, nevertheless it was proper that he who had the regulation and care of it committed to him, namely, the first man, should be as it were a sort of pattern and law to all workmen in future of everything which ought to be done by them.
Moreover it was suitable that, though all the Paradise was full of everything, it should still leave the cultivator some grounds for care, and some means of displaying his industry; for instance, by digging around it, and tending it, and softening it, and digging trenches, and irrigating it by water; and it was needful to attend to its safety, although there was no one to lay it waste, because of the wild beasts, also more especially in respect of the air and water; as, for instance, when a drought prevailed, to irrigate it with a plenteous supply of water, and in moister weather to check the superabundance of moisture by directing the course of the streams in other directions.