τέχνη δὲ ἄνευ ἀλκῆς οὐδὲν ὠφελεῖ (Thucydides 2.87.4.6) → η τέχνη απαιτεί κουράγιο, skill without heart is useless
harmony: Ar. and P. ἁρμονία, ἡ.
in unison: adj., P. ἐμμελής; adv., P. ἐμμελῶς; see also unanimously.
lo! here are friends to chant in unison with my lament: V. αἵδ' αὖ πάρεισι τοῖς ἐμοῖς θρηνήμασι φίλαι συνωδοί (Eur., Orestes 132).