[7] The husbandman, therefore, takes up innumerable shoots, with their roots entire, which have by natural process become barren, as far as bearing fruit is concerned, and which even do great injury to those plants which do bear by reason of their being planted near them. Such, then, is the art which is applied to those plants which grow out of the ground. And now let us turn our consideration to the husbandry of the soul in its turn.