[15] ‘non puto te dubitaturum, an adfectus corpora sint, tanquam ira, amor, tristitia. si dubitas, vide an voltum nobis mutent, an frontem adstringant, an faciem diffundant, an ruborem evocent, an fugent sanguinem. quid ergo? tam manifestas notas corpori credis imprimi nisi a corpore?’ _ib._ 106, 5. [16] ‘dicimus non posse quicquam ab alio moveri, nisi aliquid fuerit mobile ex semet’ Sen. _N. Q._ ii 8; ‘is ardor, qui est mundi, non agitatus ab alio, neque externo pulsu, sed per se ipse ac sua sponte [movetur]’ Cic. _N. D._ ii 11, 31. [17] οἱ δὲ Στωϊκοὶ ... κίνησιν τὴν μανωτικὴν καὶ πυκνωτικὴν τίθενται, τὴν μὲν (sc. πυκνωτικὴν) ἐπὶ τὰ ἔσω, τὴν δὲ ἐπὶ τὰ ἔξω Simpl. _Arist. cat._ p. 74; ‘tenorem, qui rarescente materia a medio tendat ad summum, eadem concrescente rursus a summo referatur ad medium’ Censorinus _de die nat._ p. 75 (Zeller, p. 128). [18] τόπον δ’ εἶναι ὁ Χρύσιππος ἀπεφαίνετο τὸ κατεχόμενον δι’ ὅλου ὑπὸ ὄντος Ar. Did. fr. 25 Diels (Arnim ii 503). [19] κενὸν μὲν εἶναί φασι τὸ οἷόν τε ὑπὸ ὄντος κατέχεσθαι, μὴ κατεχόμενον δὲ Sext. _math._ x. 3 (Arnim ii 505); τὸ μὲν οὖν κενὸν ἄπειρον εἶναι λέγεσθαι· τὸ γὰρ ἐκτὸς τοῦ κόσμου τοιοῦτ’ εἶναι, τὸν δὲ τόπον πεπερασμένον διὰ τὸ μηδὲν σῶμα ἄπειρον εἶναι Ar. Did. (as note 18). [20] Χρύσιππος διάστημα [τὸν χρόνον εἶπε] τῆς τοῦ κόσμου κινήσεως Simpl. _Arist. cat._ p. 88 l (Arnim ii 510); οἱ πλείους τῶν Στωϊκῶν [χρόνου οὐσίαν] αὐτὴν τὴν κίνησιν Aët. _plac._ i 22, 7. [21] χρόνος γὰρ οὐκ ἦν πρὸ κόσμου ἀλλ’ ἢ σὺν αὐτῷ γέγονεν ἢ μετ’ αὐτόν Philo _de mundi op._ § 26 (Arnim ii 511). [22] The question is thus stated by Seneca: ‘[quaeramus] continua sit omnis et plena materia ... an diducta, et solidis inane permixtum sit’ Sen. _Dial._ viii 4, 2; and answered as follows ‘nihil usquam inane est’ _N. Q._ iii 16, 5. Cf. Arnim i 95 and ii 425. [23] σώματα δὲ πάντα ὑπέθεντο καὶ σῶμα διὰ σώματος χωρεῖν Hipp. _Phil._ 21 (Arnim ii 469). [24] ‘animus ex inflammata anima constat, ut potissimum videri video Panaetio’ Cic. _Tusc. disp._ i 18, 42. The principle is however not carried out in the Stoic universe, in which the heat resides in the periphery, and the central earth is cold. [25] νέων τι δρᾶν μὲν εὐτονώτεραι χέρες Eur. fr. 291 quoted by Corn. 31 (Arnim i 514); ὁμοίως ὥσπερ ἰσχὺς τοῦ σώματος τόνος ἐστὶν ἱκανὸς ἐν νευροῖς, οὕτω καὶ ἡ τῆς ψυχῆς ἰσχὺς τόνος ἐστί Stob. ii 7, 5 b 4. [26] Epict. _Fr._ 57. [27] See below, § 290. [28] ὁ δὲ Κλεάνθης ... εἰπὼν ὅτι πληγὴ πυρὸς ὁ τόνος ἐστί, κἂν ἱκανὸς ἐν τῇ ψυχῇ γένηται πρὸς τὸ ἐπιτελεῖν τὰ ἐπιβάλλοντα ἰσχὺς καλεῖται καὶ κράτος Plut. _Sto. rep._ 7, 4. [29] Κλεάνθης δὲ οὕτω πώς φησι ... τὸν ἐν τῇ τῶν ὅλων οὐσία τόνον μὴ παύεσθαι Stob. i 17, 3. [30] Ἡρακλῆς δ’ ἐστὶν ὁ ἐν τοῖς ὅλοις τόνος, καθ’ ὃν ἡ φύσις ἰσχυρὰ καὶ κραταιά ἐστι Cornutus 31. [31] ‘quid autem est, quod magis credatur ex se ipso habere intentionem quam spiritus?’ Sen. _N. Q._ ii 8.