The effect, if not the prime office, of criticism is to make our absorption and our enjoyment of the things that feed the mind as aware of itself as possible, since that awareness quickens the mental demand, which thus in turn wanders further and further for pasture. This action on the part of the mind practically amounts to a reaching out for the reasons of its interest, as only by its ascertaining them can the interest grow more various. This is the very education of our imaginative life.