According to Heraclitus, the essence of fate is a certain reason which penetrates the substance of all being; and this is an ethereal body, containing in itself that seminal faculty which gives an original to every being in the universe. Plato affirms that it is the eternal reason and the eternal law of the nature of the world. Chrysippus, that it is a spiritual faculty, which in due order doth manage and rule the universe. Again, in his book styled the "Definitions," that fate is the reason of the world, or that it is that law whereby Providence rules and administers everything that is in the world; or it is that reason by which all things have been, all things are, and all things will be produced. The Stoics say that it is a chain of causes, that is, it is an order and connection of causes which cannot be resisted. Posidonius, that it is a being the third in degree from Jupiter; the first of beings is Jupiter, the second Nature, and the third Fate.
CHAPTER XXIX. OF FORTUNE.
Plato says, that it is an accidental cause and a casual consequence in things which proceed from the election and counsel of men. Aristotle, that it is an accidental cause in those things done by an impulse for a certain end; and this cause is uncertain and unstable: there is a great deal of difference betwixt that which flows from chance and that which falls out by Fortune; for that which is fortuitous allows also chance, and belongs to things practical; but what is by chance cannot be also by Fortune, for it belongs to things without action: Fortune, moreover, pertains to rational beings, but chance to rational and irrational beings alike, and even to inanimate things. Epicurus, that it is a cause not always consistent, but various as to persons, times, and manners. Anaxagoras and the Stoics, that it is that cause which human reason cannot comprehend; for there are some things which proceed from necessity, some things from Fate, some from choice and free-will, some from Fortune, some from chance.
CHAPTER XXX. OF NATURE.
Empedocles affirms that Nature is nothing else but the mixture and separation of the elements; for thus he writes in the first book of his natural philosophy:—
Nature gives neither life nor death,
Mutation makes us die or breathe.
The elements first are mixed, then each
Do part: this Nature is in mortal speech.
Anaxagoras is of the same opinion, that Nature is coalition and separation, that is, generation and corruption.