Of the Training of Black Men, W. E. B. Du Bois

And last of all there trickles down that third and darker thought, the thought of the things themselves, the confused half-conscious mutter of men who are black and whitened, crying Liberty, Freedom, Opportunity — vouchsafe to us, O boastful World, the chance of living men! To be sure, behind the thought lurks the afterthought: suppose, after all, the World is right and we are less than men? Suppose this mad impulse within is all wrong, some mock mirage from the untrue?