Full Idea
A foresight of future events, such as could be arrived at by consideration, is the virtue of man.
Gist of Idea
The virtue of man is thoughtful foresight of future events
Source
report of Chilo (poems (frags) [c.490 BCE]) by Diogenes Laertius - Lives of Eminent Philosophers 01.4.1
Book Reference
Diogenes Laertius: 'Diogenes Laertius', ed/tr. Yonge,C.D. [Henry G. Bohn 1853], p.32