From Wikipedia:
In Greek mythology, Caerus /ˈsɪərəs, ˈsiːrəs/ (Greek: Καιρός, Kairos, the same as kairos) was the personification of opportunity, luck and favorable moments.

Caerus is represented as a young and beautiful god. Opportunity obviously never gets old, and beauty is always opportune, flourishing in its own season. Caerus stands on tiptoe because he is always running, and like Hermes, he has wings in his feet to fly with the wind. He holds a razor, or else scales balanced on a sharp edge—attributes illustrating the fleeting instant in which occasions appear and disappear.