Pythagoras regarded rebirth as a gradual process of purification and taught that the soul by reason of nobility of character gained by struggles upon earth was destined to be exalted eventually into far higher modes of life. "Imagination," he explained:
is the remembrance of precedent spiritual, mental, and physical states, while fancy is the disorderly production of the material brain.
Man is perfected first by conversing with gods, which he can do only when he abstains from evil and strives to resemble divine natures; secondly, by doing good to others, which is an imitation of the gods; thirdly, by leaving the mortal body.
By our separation from the Deity, we lost the wings which raised us towards celestial beings and were thus precipitated into the region of death where all evils dwell. By putting away earthly passions and devoting ourselves to virtue, our wings will be renewed and we shall rise to that existence where we shall find the true good without any admixture of evil.
The soul of man being between spirits who always contemplate the Divine Essence and those who are incapable of contemplating it, can raise itself to the one, or sink itself to the other.
Every quality which a man acquires originates a good or bad spirit, which abides by him in this world and after death remains with him as a companion.
Pythagoras taught that man is a microcosm, a compendium of the universe, with a triple nature, composed of (1) an immortal spirit, the Spiritual Soul, intuitive perception, the Nous, a portion of the Deity; (2) a human intelligence, the Human Soul, the rational principle, the Phren; and (3) the sensitive irrational nature, the Animal Soul, the seat of the passions and desires, the Thymos. The Nous and the Thymos, he stated, are common to man and the lower animals, but the Phren, which in its higher aspect is immortal, is peculiar to man.
The immortal mind of man is as much more excellent than his sensitive irrational nature as the sun is more excellent than the stars.
The physical body is but a temporary garment of the soul, into which "the Nous enters from without." "The sense perceptions are deceptive."
The principle of life is about the heart, but the principle of reason and intelligence in the head.
Pythagoras added that at death the ethereal part of man freed from the chains of matter is conducted by Hermes Psychopompos, the Guide of Souls, into the region of the dead, where it remains in a state according to its merit until it is sent back to earth to inhabit another body. The object of rebirth is gradually to purify the soul by successive probations, until finally it shall be fitted to return to the immortal source whence it emanated.
(5) The Earth and the Universe
It is well-known that the ideas expressed by Plato in his Timaeus, the dialog which he named after his Pythagorean teacher, are derived almost entirely from Pythagorean sources. Therefore it is probable that Pythagoras taught about the earlier continents, which were destroyed alternately by fire and water, and in particular about the legends of Atlantis, including the account of an Atlantean invasion of Greece about 10,000 years b. c. before the Greeks lived in the Greek lands—an invasion which was repelled by the inhabitants of prehistoric Athens, who were akin to the ancient Egyptians.
In regard to our solar system, Pythagoras knew not only that the earth is spherical, but also taught that the sun, likewise spherical, not the earth, is the center—a theory rediscovered more than 2000 years later by Copernicus and Galileo. Pythagoras also explained the obliquity of the ecliptic, the causes of eclipses, that the morning and evening star are the same, that the moon shines by light reflected from the sun, and that the Milky Way is composed of stars. He held that "the Universe has neither height nor depth but is infinite in extent," that