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Cleombrotus said nothing more, and his account appeared marvellous to all. But when Heraeleon inquired in what way this was related to Plato and how he had given the key-note for this topic, Cleombrotus said, You well remember that he summarily decided against an infinite number of worlds, but had doubts about a limited number; and up to five Cf. Plato, Timaeus, 55 c-d; Moralia, 389 f, supra, and 430 b, infra. he conceded a reasonable probability to those who postulated one world to correspond to each element, but, for himself, he kept to one. This seems to be peculiar to Plato, for the other philosophers conceived a fear of plurality, Cf. Aristotle, De Caelo, i. 8 (276 a 18). feeling that if they did not limit matter to one world, but went beyond one, an unlimited and embarrassing infinity would at once fasten itself upon them.
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But, said I, did your far-away friend set a limit to the number of worlds, as Plato did, or did you not go so far as to sound him on this point when you had your interview with him ?