Hegel on the Revolution of Consciousness

All revolutions, in the sciences no less than in general history, originate only in this, that the spirit of man, for the understanding and comprehension of himself, for the possessing of himself, has now altered his categories, uniting himself in a truer, deeper, more intrinsic relation with himself.

SOURCE: Hegel, G.W.F. Philosophy of Nature, trans. by A.V. Miller (Oxford: Oxford University Press, 1970), p. 11.