CLEINIAS: Very true.
ATHENIAN: Yes, very true; the soul then directs all things in heaven, and earth, and sea by her movements, and these are described by the terms—will, consideration, attention, deliberation, opinion true and false, joy and sorrow, confidence, fear, hatred, love, and other primary motions akin to these; which again receive the secondary motions of corporeal substances, and guide all things to growth and decay, to composition and decomposition, and to the qualities which accompany them, such as heat and cold, heaviness and lightness, hardness and softness, blackness and whiteness, bitterness and sweetness, and all those other qualities which the soul uses, herself a goddess, when truly receiving the divine mind she disciplines all things rightly to their happiness; but when she is the companion of folly, she does the very contrary of all this. Shall we assume so much, or do we still entertain doubts?
CLEINIAS: There is no room at all for doubt.
ATHENIAN: Shall we say then that it is the soul which controls heaven and earth, and the whole world? that it is a principle of wisdom and virtue, or a principle which has neither wisdom nor virtue? Suppose that we make answer as follows:
CLEINIAS: How would you answer?
ATHENIAN: If, my friend, we say that the whole path and movement of heaven, and of all that is therein, is by nature akin to the movement and revolution and calculation of mind, and proceeds by kindred laws, then, as is plain, we must say that the best soul takes care of the world and guides it along the good path.
CLEINIAS: True.
ATHENIAN: But if the world moves wildly and irregularly, then the evil soul guides it.
CLEINIAS: True again.
ATHENIAN: Of what nature is the movement of mind? To this question it is not easy to give an intelligent answer; and therefore I ought to assist you in framing one.