Full Idea
The virtue of each thing is a Triad: intelligence, strength, luck.
Gist of Idea
A virtue is a combination of intelligence, strength and luck
Source
Ion (fragments/reports [c.435 BCE], B1), quoted by (who?) - where?
Book Reference
'Ancilla to the Pre-Socratic Philosophers', ed/tr. Freeman,Kathleen [Harvard 1957], p.70