Choosing is essence of consciousness, iv. 4.37 (28-[500]).

Chorus, see Ballet, vi. 9.8 (9-[165]).

Circe, i. 6.8 (1-[53]).

Circle, iii. 8.7 (30-[543]); v. 1.7, 11 (10-[184], [191]).

Circular movement is that of soul, vi. 9.8 (9-[162], [164]); ii. 2.1 (14-[227]); iv. 4.16 (28-[462]).

Circular movement of heavens, ii. 2.2 (14-[230]).

Circulating around heavens, iii. 4.2 (15-[234]).

Cities haunted by divinities, vi. 5.12 (23-[332]).

Classification of purification, result of virtue, i. 2.4 (19-[260]).

Climate, a legitimate governing cause, iii. 1.5 (3-[93]).