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.

When all beliefs are challenged together, the just and necessary ones have a chance to step forward and re-establish themselves alone.

Nothing so much enhances a good as to make sacrifices for it.

History is always written wrong, and so always needs to be rewritten.

Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual.

One real world is enough.

...science is nothing but developed perception, interpreted intent, common-sense rounded out and minutely articulated. It is therefore as much an instinctive product, as much a stepping forth of human courage in the dark, as is any inevitable dream or impulsive action.