Unlike Plato, Aristotle did not make theoretical knowledge an ethical criterion, although he played a great role in the development of many fields of inquiry. Nonetheless, he placed intellectual “virtue” alongside friendship or love as an essential component of the highest ethical development.
I previously suggested there is an indirect way in which any inquiry can help make us better deliberators. Knowledge can of course help, but only if it is relevant to the question at hand. But the ethical value of inquiry lies more in a kind of theoretical practice than in the particular knowledge that may result. Intellectual virtue, I want to say, has to do especially with practices of free and well-rounded interpretation.