What is the name which is given to self-motion when manifested in any material substance? 'Life.' And soul too is life? 'Very good.' And are there not three kinds of knowledge--a knowledge (1) of the essence, (2) of the definition, (3) of the name? And sometimes the name leads us to ask the definition, sometimes the definition to ask the name. For example, number can be divided into equal parts, and when thus divided is termed even, and the definition of even and the word 'even' refer to the same thing. 'Very true.' And what is the definition of the thing which is named 'soul'? Must we not reply, 'The self-moved'? And have we not proved that the self-moved is the source of motion in other things? 'Yes.' And the motion which is not self-moved will be inferior to this? 'True.' And if so, we shall be right in saying that the soul is prior and superior to the body, and the body by nature subject and inferior to the soul? 'Quite right.' And we agreed that if the soul was prior to the body, the things of the soul were prior to the things of the body? 'Certainly.' And therefore desires, and manners, and thoughts, and true opinions, and recollections, are prior to the length and breadth and force of bodies. 'To be sure.' In the next place, we acknowledge that the soul is the cause of good and evil, just and unjust, if we suppose her to be the cause of all things? 'Certainly.' And the soul which orders all things must also order the heavens? 'Of course.' One soul or more? More; for less than two are inconceivable, one good, the other evil. 'Most true.' The soul directs all things by her movements, which we call will, consideration, attention, deliberation, opinion true and false, joy, sorrow, courage, fear, hatred, love, and similar affections. These are the primary movements, and they receive the secondary movements of bodies, and guide all things to increase and diminution, separation and union, and to all the qualities which accompany them--cold, hot, heavy, light, hard, soft, white, black, sweet, bitter; these and other such qualities the soul, herself a goddess, uses, when truly receiving the divine mind she leads all things rightly to their happiness; but under the impulse of folly she works out an opposite result. For the controller of heaven and earth and the circle of the world is either the wise and good soul, or the foolish and vicious soul, working in them. 'What do you mean?' If we say that the whole course and motion of heaven and earth is in accordance with the workings and reasonings of mind, clearly the best soul must have the care of the heaven, and guide it along that better way. 'True.' But if the heavens move wildly and disorderly, then they must be under the guidance of the evil soul. 'True again.' What is the nature of the movement of the soul? We must not suppose that we can see and know the soul with our bodily eyes, any more than we can fix them on the midday sun; it will be safer to look at an image only.