§21.1Fr. 21
Θ. ἐν τοῖς Φυσικοῖς ἀπορεῖ πρὸς τὸν ἀποδοθέντα τοῦ τόπου λόγον ὑπὸ τοῦ Ἀριστοτέλους τοιαῦτα, ὅτι τὸ σῶμα ἔσται ἐν ἐπιφανείᾳ, ὅτι κινούμενος ἔσται ὁ τόπος, ὅτι οὐ πᾶν σῶμα ἐν τόπῳ, οὐδὲ γὰρ ἡ ἀπλανὴς, ὅτι ἐὰν συναχθῶσιν αἱ σφαῖραι, καὶ ὅλος ὁ οὐραο νὸς οὐκ ἔσται ἐν τόπῳ, ὅτι τὰ ἐν τόπῳ ὄντα μηδὲν αὐτὰ μετακινηθέντα, ἐὰν ἀφαιρεθῇ τὰ περιέχοντα αὐτὰ, οὐκέτι ἔσται ἐν τόπῳ.
Fr. 21 Theophrastus, in his *Physics*, raises such difficulties against the definition of place given by Aristotle: that body will be in a surface; that place will be in motion; that not every body is in a place, for not even the sphere of the fixed stars is; that if the spheres are gathered together, even the whole heaven will not be in a place; and that things which are in a place, though they themselves are not moved at all, if the things containing them are removed, will no longer be in a place.