All things, therefore, he says, when unbegotten, are in us potentially, not actually, as the grammatical or geometrical (art). If, then, one receives proper instruction and teaching, and (where consequently) what is bitter will be altered into what is sweet,—that is, the spears into pruning-hooks, and the swords into plough-shares,—there will not be chaff and wood begotten for fire, but mature fruit, fully formed, as I said, equal and similar to the unbegotten and indefinite power. If, however, a tree continues alone, not producing fruit fully formed, it is utterly destroyed. For somewhere near, he says, is the axe (which is laid) at the roots of the tree. Every tree, he says, which does not produce good fruit, is hewn down and cast into fire.