πάντες ἄνθρωποι τοῦ εἰδέναι ὀρέγονται φύσει → all men naturally desire knowledge
grădātus: a, um, adj. id.,I furnished with steps (post-Aug.): densis gradatisque corticum pollicibus ut orbibus, Plin. 13, 4, 7, § 29; Plin. Ep. 5, 6, 17.