Nature of soul is intermediate, iv. 8.7 (6-[130]).

Nature of Supreme, i. 8.2 (51-[1144]).

Nature of universal soul, i. 8.2 (51-[1144]).

Nature posterior to intelligence, iv. 7.8 (2-[78]).

Nature reason is result of immovable contemplation, iii. 8.2 (30-[533]).

Nature, relation of animal to human, i. 1.7 (53-[1199]).

Nature sterility indicated by castration, iii. 6.19 (26-[384]).

Nature, Stoic name for generative power in seeds, v. 9.6 (5-[110]).

Nature, to what part belongs emotions? i. 1.1 (53-[1191]).

Nature's mother is universal reason and father the formal reasons, iii. 8.4 (30-[535]).