The argument called the “ruling argument” appears to have been proposed from such principles as these: there is in fact a common contradiction between one another in these three positions, each two being in contradiction to the third. The propositions are, that everything past must of necessity be true; that an impossibility does not follow a possibility; and that thing is possible which neither is nor t at a t will be true. Diodorus observing this contradiction employed the probative force of the first two for the demonstration of this proposition, “That nothing is possible which is not true and never will be.” Now another will hold these two: “That something is possible, which is neither true nor ever will be”: and “That an impossibility does not follow a possibility,” But he will not allow that everything which is past is necessarily true, as the followers of Cleanthes seem to think, and Antipater copiously defended them. But others maintain the other two propositions, “That a thing is possible which is neither true nor will he true”: and “That everything which is past is necessarily true”; but then they will maintain that an impossibility can follow a possibility. But it is impossible to maintain these three propositions, because of their common contradiction.

If then any man should ask me which of these propositions do I maintain? I will answer him that I do not know; but I have received this story, that Diodorus maintained one opinion, the followers of Panthoides, I think, and Cleanthes maintained another opinion, and those of Chrysippus a third. “What then is your opinion?” I was not made for this purpose, to examine the appearances that occur to me and to compare what others say and to form an opinion of my own on the thing. Therefore I differ not at all from the grammarian. “Who was Hector’s father?” Priam. “Who were his brothers?” Alexander and Deiphobus. “Who was their mother?” Hecuba. I have heard this story. “From whom?” From Homer. And Hellanicus also, I think, writes about the same things, and perhaps others like him. And what further have I about the ruling argument? Nothing. But, if I am a vain man, especially at a banquet, I surprise the guests by enumerating those who have written on these matters. Both Chrysippus has written wonderfully in his first book about “Possibilities,” and Cleanthes has written specially on the subject, and Archedemus. Antipater also has written not only in his work about “Possibilities,” but also separately in his work on the ruling argument. Have you not read the work? “I have not read it.” Read. And what profit will a man have from it? he will be more trifling and impertinent than he is now; for what else have you rained by reading it? What opinion have you formed on this subject? none; but you will tell us of Helen and Priam, and the island of Calypso which never was and never will be. And in this matter indeed it is of no great importance if you retain the story, but have formed no opinion of your own. But in matters of morality this happens to us much more than in these things of which we are speaking.

“Speak to me about good and evil.” Listen:

The wind from Ilium to Ciconian shores
Brought me.

“Of things some are good, some are bad, and others are indifferent. The good then are the virtues and the things which partake of the virtues; the bad are the vices, and the things which partake of them; and the indifferent are the things which lie between the virtues and the vices, wealth, health, life, death, pleasure, pain.” Whence do you know this? “Hellanicus says it in his Egyptian history”; for what difference does it make to say this, or to say that “Diogenes has it in his Ethic,” or Chrysippus or Cleanthes? Have you then examined any of these things and formed an opinion of your own? Show how you are used to behave in a storm on shipboard? Do you remember this division, when the sail rattles and a man, who knows nothing of times and seasons, stands by you when you are screaming and says, “Tell me, I ask you by the Gods, what you were saying just now. Is it a vice to suffer shipwreck: does it participate in vice?” Will you not take ............