The headword phrase -- in the imperative mode, and perhaps modelled on the famous Delphic maxim "know yourself" (gamma 333, gamma 334) -- looks proverbial but is not attested as such. The closest extant parallel for it occurs in Marcus Aurelius, Meditations 8.41.1: pa/nta dh\ tau=ta e)pi\ seauto\n meta/fere "change all these things toward yourself".