to give a wider range to possible things than to future things, for the purpose of mitigating the odious and frightful conclusions which were drawn from their dogma of fatality.'
It is sufficiently evident that Cicero when writing to Varro the words that have just been quoted (lib. 9, Ep. 4, Ad Familiar.) had not enough comprehension of the effect of Diodorus's opinion, since he found it preferable. He presents tolerably well in his book De Fato the opinions of those writers, but it is a pity that he has not always added the reasons which they employed. Plutarch in his treatise on the contradictions of the Stoics and M. Bayle are both surprised that Chrysippus was not of the same opinion as Diodorus, since he favours fatality. But Chrysippus and even his master Cleanthes were on that point more reasonable than is supposed. [233] That will be seen as we proceed. It is open to question whether the past is more necessary than the future. Cleanthes held the opinion that it is. The objection is raised that it is necessary ex hypothesi for the future to happen, as it is necessary ex hypothesi for the past to have happened. But there is this difference, that it is not possible to act on the past state, that would be a contradiction; but it is possible to produce some effect on the future. Yet the hypothetical necessity of both is the same: the one cannot be changed, the other will not be; and once that is past, it will not be possible for it to be changed either.