ἡ κέρκος τῇ ἀλώπεκι μαρτυρεῖ → you can tell a fox by its tail, small traits give the clue to the character of a person
kunsterfahren, artis (od. artium) peritus od. sciens. Vgl. »Kunstkenner«. – Kunsterfahrenheit, artis od. artium peritia od. scientia.