Deorum_, with regard to the evasions of the Epicureans expressed the sound opinion (as M. Bayle observes towards the end of the same page) that it would be much less shameful to admit that one cannot answer one's opponent, than to have recourse to such answers. Yet we shall see that M. Bayle himself confused the certain with the necessary, when he maintained that the choice of the best rendered things necessary. 170. Let us come now to the possibility of things that do not happen, and I will give the very words of M. Bayle, albeit they are somewhat discursive. This is what he says on the matter in his _Dictionary_ (article 'Chrysippus', let. S, p. 929): 'The celebrated dispute on things possible and things impossible owed its origin to the doctrine of the Stoics concerning fate. The question was to know whether, among the things which have never been and never will be, there are some possible; or whether all that is not, all that has never been, all that will never be, was impossible. A famous dialectician of the Megaric Sect, named Diodorus, gave a negative answer to the first of these two questions and an affirmative to the second; but Chrysippus vehemently opposed him. Here are two passages of Cicero (epist. 4, lib. 9, _Ad Familiar._): "[Greek: peri dynaton] me scito [Greek: kata Diodoron krinein]. Quapropter si venturus es, scito [231] necesse esse te venire. Sin autem non es, [Greek: ton adynaton] est te venire. Nunc vide utra te [Greek: krisis] magis delectet, [Greek: Chrysippeia] ne, an haec; quam noster Diodorus [a Stoic who for a long time had lived in Cicero's house] non concoquebat." This is quoted from a letter that Cicero wrote to Varro. He sets forth more comprehensively the whole state of the question, in the little book _De Fato_. I am going to quote a few pieces (Cic., _De Fato_, p. m. 65): "Vigila, Chrysippe, ne tuam causam, in qua tibi cum Diodoro valente Dialectico magna luctatio est, deseras ... omne ergo quod falsum dicitur in futuro, id fieri non potest. At hoc, Chrysippe, minime vis, maximeque tibi de hoc ipso cum Diodoro certamen est. Ille enim id solum fieri posse dicit, quod aut sit verum, aut futurum sit verum; et quicquid futurum sit, id dicit fieri necesse esse; et quicquid non sit futurum, id negat fieri posse. Tu etiam quae non sint futura, posse fieri dicis, ut frangi hanc gemmam, etiamsi id nunquam futurum sit: neque necesse fuisse Cypselum regnare Corinthi, quamquam id millesimo ante anno Apollinis Oraculo editum esset.... Placet Diodoro, id solum fieri posse, quod aut verum sit, aut verum futurum sit: qui locus attingit hanc quaestionem, nihil fieri, quod non necesse fuerit; et quicquid fieri possit, id aut esse jam, aut futurum esse: nec magis commutari ex veris in falsa ea posse quae futura sunt, quam ea quae facta sunt: sed in factis immutabilitatem apparere; in futuris quibusdam, quia non apparent, ne inesse quidem videri: ut in eo qui mortifero morbo urgeatur, verum sit, hic