One comfort is, that [the study of ] 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; a flowing light-fountain, as I say, of native original insight, of manhood and heroic nobleness; — in whose radiance all souls feel that it is well with them. On any terms whatsoever, you will not grudge to wander in such neighborhood for a while. These Six classes of Heroes, chosen out of widely distant countries and epochs, and in mere external figure differing altogether, ought, if we look faithfully at them, to illustrate several things for us. Could we see them well, we should get some glimpses into the very marrow of the world’s history. How happy, could I but, in any measure, in such times as these, make manifest to you the meanings of Heroism; the divine relation (for I may well call it such) which in all times unites a Great Man to other men; and thus, as it were, not exhaust my subject, but so much as break ground on it! At all events, I must make the attempt.
– Thomas Carlyle, On Heroes, Hero-Worship, and the Heroic in History, Prologue.