“Since we consider knowledge to be something beautiful and honored, and one sort more so than another either on account of its precision or because it is about better and more wondrous things, on both these accounts we should with good reason rank the inquiry of the soul among the primary studies. And it seems that acquaintance with it contributes greatly toward all truth and especially toward the truth about nature, since the soul is in some way the governing source of living things. And we are seeking to bring to sight and to understanding the nature and thinghood of the soul, and then whatever follows about it, among which seem to be some attributes of the soul by itself, and others that belong to the living things, on account of the soul.”
—Aristotle, On The Soul