τούτου δὲ συμβαίνοντος ἀναγκαῖον γίγνεσθαι πάροδον καὶ τροπὰς τῶν ἐνδεδεμένων ἄστρων → but if this were so, there would have to be passings and turnings of the fixed stars
subs.
P. διαφάνεια, ἡ.
Clearness, perspicuity: P. and V. σαφήνεια, ἡ.
Met., simplicity (of character, etc.): P. ἁπλότης, ἡ.