Meditations 3.2.1
Marcus Aurelius to himself
Χρὴ καὶ τὰ τοιαῦτα παραφυλάσσειν, ὅτι καὶ τὰ ἐπιγινόμενα τοῖς φύσει γινομένοις ἔχει τι εὔχαρι καὶ ἐπαγωγόν. οἷον ἄρτου ὀπτωμένου παραρρήγνυταί τινα μέρη· καὶ ταῦτα οὖν τὰ διέχοντα οὕτως καὶ τρόπον τινὰ παρὰ τὸ ἐπάγγελμα τῆς ἀρτοποιίας ἔχοντα ἐπιπρέπει πως καὶ προθυμίαν πρὸς τὴν τροφὴν ἰδίως ἀνακινεῖ.
Notice such things as this too: even the incidental effects of natural processes have a certain charm and attraction. When bread is baking, for example, some parts split open. These cracks, which in a way depart from what the baker's craft promises, still have a certain beauty and stir the appetite in a distinctive way.