Full Idea
One's character must necessarily grow like that with which one spends the greater part of the day.
Gist of Idea
The way you spend your time will form your character
Source
Antiphon (fragments/reports [c.439 BCE], B62), quoted by John Stobaeus - Anthology 3.31.41
Book Reference
'Ancilla to the Pre-Socratic Philosophers', ed/tr. Freeman,Kathleen [Harvard 1957], p.152