Columbus gave the world another world.

Fanaticism consists of redoubling your effort when you have forgotten your aim.

To know what people really think, pay regard to what they do, rather than what they say.

That life is worth living is the most necessary of assumptions, and were it not assumed, the most impossible of conclusions.

If pain could have cured us we should long ago have been saved.

The human mind is not rich enough to drive many horses abreast and wants one general scheme, under which it strives to bring everything.

You and I possess manifold ideal bonds in the interests we share; but each of us has his poor body and his irremediable, incommunicable dreams.