32. For we say that those things are alive which spring up and grow, and no one would deny that all things that participate in life and natural motion are animate, yet at the same time one cannot say that such life partakes of a perfect soul,—for though a certain animate operation exists in plants, it does not attain to the motions of sense; and on the other hand, though a certain further animate power exists in the brutes, neither does this attain perfection, since it does not contain in itself the grace of reason and intelligence.