Cicero's definition of philosophy is well known-"the knowledge of things divine and human and of the causes in which these things are contained," rerum divinarum et humanarum, causarumque quibus hæ res continentur;
Jakina da Cicerok filosofiaz egiten zuen definizioa, hari "jainkozkoaren eta gizatiarrezkoaren zientzia, eta haietan edukitzen diren kausena", rerum divinarum et humanarum, causarumque quibus hae res continentur;