§8.20.1Ἡ φύσις ἐστόχασται ἑκάστου οὐδέν τι ἔλασσον τῆς ἀπολήξεως ἢ τῆς ἀρχῆς τε καὶ διεξαγωγῆς, ὡς ὁ ἀναβάλλων τὴν σφαῖραν·
Nature aims at the end of each thing no less than its beginning and its continuation, like one who throws up a ball.
τί οὖν ἀγαθὸν τῷ σφαιρίῳ ἀναφερομένῳ ἢ κακὸν καταφερομένῳ ἢ καὶ πεπτωκότι;
What good then is there for the ball while rising, or what evil while falling, or even when it has fallen?
τί δὲ ἀγαθὸν τῇ πομφόλυγι συνεστώσῃ ἢ κακὸν διαλυθείσῃ;
And what good is there for the bubble while it holds together, or what evil when it is dissolved?
τὰ ὅμοια δὲ καὶ ἐπὶ λύχνου.
The same also applies to a lamp.