Definitions: (1) carefully observant; vigilant; attentive <especially with parental care>; cautious; diligent; awake; aware; (2) guarding against danger; (3) alert to opportunity; (4) mentally informed; (5) acting with discretion; self-observant; self-restrained

Symbol: eyes

Mythological Figure: Argus, a Greek mythological giant had a hundred eyes and was ever watchful. After he was killed by Hermes, the god Hera set his eyes into the tail of the peacock.