Δύο γὰρ, ἐπιστήμη τε καὶ δόξα, ὧν τὸ μὲν ἐπίστασθαι ποιέει, τὸ δὲ ἀγνοεῖν → Two different things are science and belief: the one brings knowledge, the other ignorance
in-frăgĭlis: e, adj.,
I that cannot be broken to pieces.
I Lit.: adamas, Plin. H. N. 20 prooem. § 2.—
II Trop., strong, that cannot be weakened: vox, Ov. Tr. 1, 5, 53: animi, Sen. Vit. B. 9.