Everything becomes hateful when a man abandons his own nature and acts at variance with it.

ἅπαντα δυσχέρεια, τὴν αὑτοῦ φύσιν / ὅταν λιπών τις δρᾷ τὰ μὴ προσεικότα.

Sophocles, Philoctetes 902.