They were all, he said, disciples of Philolaos and Eurytos.[734] Plato was on friendly terms with these men, and dedicated the _Phaedo_ to them.[735] Xenophilos was the teacher of Aristoxenos, and lived in perfect health at Athens till the age of a hundred and five.[736] Footnote 732: For Philolaos, see Plato, _Phd._ 61 d 7; e 7; and for Lysis, Aristoxenos in Iambl. _V. Pyth._ 250 (R. P. 59 b). Footnote 733: Diog. viii. 79-83 (R. P. 61). Aristoxenos himself came from Taras. For the political activity of the Tarentine Pythagoreans, see Meyer, _Gesch. des Alterth._ v. § 824. The story of Damon and Phintias (told by Aristoxenos) belongs to this time. Footnote 734: Diog. viii. 46 (R. P. 62). Footnote 735: Compare the way in which the _Theaetetus_ is dedicated to the school of Megara. Footnote 736: See Aristoxenos _ap._ Val. Max. viii. 13, ext. 3; and Souidas _s.v._ [Sidenote: Philolaos.] 139. This generation of the school really belongs, however, to a later period, and cannot be profitably studied apart from Plato; it is with their master Philolaos we have now to deal. The facts we know about his teaching from external sources are few in number. The doxographers, indeed, ascribe to him an elaborate theory of the planetary system, but Aristotle never mentions his name in connexion with this. He gives it as the theory of “the Pythagoreans” or of “some Pythagoreans.”[737] It seems natural to suppose, however, that the Pythagorean elements of Plato’s _Phaedo_ and _Gorgias_ come mainly from Philolaos. Plato makes Sokrates express surprise that Simmias and Kebes had not learnt from him why it is unlawful for a man to take his life,[738] and it seems to be implied that the Pythagoreans at Thebes used the word “philosopher” in the special sense of a man who is seeking to find a way of release from the burden of this life.[739] It is extremely probable that Philolaos spoke of the body (σῶμα) as the tomb (σῆμα) of the soul.[740] In any case, we seem to be justified in holding that he taught the old Pythagorean religious doctrine in some form, and it is likely that he laid special stress upon knowledge as a means of release. That is the impression we get from Plato, and he is by far the best authority we have on the subject. Footnote 737: See below, § 150–152. Footnote 738: Plato, _Phd._ 61 d 6. Footnote 739: