Nothing in the world can take the place of persistence. Talent will not; nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education alone will not; the world is full of educated derelicts. Persistence and determination alone are omnipotent.
The spirit of the people must frequently be roused, in order to curb the ambition of the court; and the dread of rousing this spirit must be employed to prevent that ambition. Nothing so effectual to this purpose as the liberty of the press; by which all the learning, wit, and genius of the nation, may be employed on the side of freedom, and every one be animated to its defense.
Every positive value has its price in negative terms, and you never see anything very great which is not, at the same time, horrible in some respect... the genius of Einstein leads to Hiroshima.