τέχνη δὲ ἄνευ ἀλκῆς οὐδὲν ὠφελεῖ (Thucydides 2.87.4.6) → η τέχνη απαιτεί κουράγιο, skill without heart is useless
vīrŭlentus: a, um, adj. virus,I full of poison, poisonous, virulent: serpentes, Gell. 16, 11, 2.