We cannot look, however imperfectly, upon a great man, without gaining something by him.
 Thomas Carlyle, On Heroes, Hero-Worship, and The Heroic in History (1841). copy citation

Context

“the soul of the whole world's history, it may justly be considered, were the history of these. Too clearly it is a topic we shall do no justice to in this place! One comfort is, that Great Men, taken up in any way, are profitable company. We cannot look, however imperfectly, upon a great man, without gaining something by him. He is the living light-fountain, which it is good and pleasant to be near. The light which enlightens, which has enlightened the darkness of the world; and this not as a kindled lamp only, but rather as a natural luminary shining by the gift of Heaven;” source