se non co' raziocini, de' quali non erano ancor capaci, co' sensi, quantunque falsi nella materia, veri però nella loro forma (che fu la logica conforme a sì fatte loro nature) — loro germogliò la morale poetica con fargli pii.
if not with reasoning, of which they were not yet capable, with the senses, although false in their matter, true however in their form (which was the logic in conformity with their natures) - poetic morality germinated in them by making them pious.