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The true essence of scientific discovery is not in the answers it provides, but in the new questions it raises.
The best way to predict the future is to create it.
The first sentence of the novel is the most important, but the last sentence is the one that stays with you.
The deepest wounds are invisible.
The division of labour, so far as it can be introduced, occasions, in every art, a proportionable increase of the productive powers of labour.