Aet. iv. 2; _Dox._ 386. Pythagoras holds that number moves itself, and he takes number as an equivalent for intelligence. iv. 4; 389. Pythagoras, Plato: According to a superficial account the soul is of two parts, the one possessing, the other lacking, reason; but according to close and exact examination, of three parts; for the unreasoning part they divide into the emotions and the desires. (Theodor. v. 20); _Dox._ 390. The successors of Pythagoras saying that body is a mixture of five elements (for they ranked the aether as a fifth along with the four) held that the powers of the soul are of the same number as these. And these they name intelligence and wisdom and understanding and opinion and sense-perception. iv. 5; 391. Pythagoras: The principle of life is about the heart, but the principle of reason and intelligence is about the head. iv. 5; 392. Pythagoras et al.: The intelligence enters from without. iv. 7; 392. Pythagoras, Plato: The soul is imperishable. iv. 9; 396. Pythagoras et al.: The sense-perceptions are deceptive. iv. 9; 397. Pythagoras, Plato: Each of the sensations is pure, proceeding from each single element. With reference to vision, it was of the nature of aether; hearing, of the nature of wind; smell, of the nature of fire; taste, of the nature of moisture; touch, of the nature of earth. iv. 14; 405. The followers of Pythagoras and of the mathematicians on reflections of vision: For vision moves directly as it were against the bronze [of a mirror], and meeting with a firm smooth surface it is turned and bent back on itself, meeting some such experience as when the arm is extended and then bent back to the shoulder. iv. 20; 409. Pythagoras, Plato, Aristotle: Sound is immaterial. For it is not air, but it is the form about the air and the appearance [ἐπιφανεία] after some sort of percussion which becomes sound; and every appearance is immaterial; for it moves with bodies, but is itself absolutely immaterial;[72] as in the case of a bent rod the surface-appearance suffers no change, but the matter is what is bent. Aet. _Plac._ v. 1; 415. Pythagoras did not admit the sacrificial part alone (of augury). v. 3; 417. Pythagoras: The seed is foam of the best part of the blood, a secretion from the nourishment, like blood and marrow. v. 4; 417. Pythagoras, Plato, Aristotle: The power of seed is immaterial, like intelligence, the moving power; but the matter that is poured forth is material. v. 20; 432. Pythagoras, Plato: The souls of animals called unreasoning are reasonable, not however with active reasoning powers, because of an imperfect mixture of the bodies and because they do not have the power of speech, as in the case of apes and dogs; for these have intelligence but not the power of speech. Ar. Did. _Ep._ Fr. 32; _Dox._ 467. Apollodoros in the second book _Concerning the gods_: It is the Pythagorean opinion that the morning and the evening star are the same.