Full Idea
If you consider the virtues that are recognised among human beings, you will find that they are all increased by study and practice.
Gist of Idea
All human virtues are increased by study and practice
Source
report of Socrates (reports of career [c.420 BCE]) by Xenophon - Memorabilia of Socrates 2.6.41
Book Reference
Xenophon: 'Conversations of Socrates', ed/tr. Waterfield,R/Tredennick,H. [Penguin 1990], p.127
A Reaction
'Study' is the intellectualist part of this remark; the reference to 'practice' fits with Aristotle view that virtue is largely a matter of good habits. The next question would be how theoretical the studies should be. Philosophy, or newspapers?