Only a few years ago there was no person too ignorant to successfully answer Charles Darwin; and the more ignorant he was the more cheerfully he undertook the task.

The more false we destroy, the more room there will be for the true.

[T]he blossom of benevolence, of charity, is the fairest flower, no matter whether it blooms by the side of a hovel, or bursts from a vine climbing the marble pillar of a palace. I respect no man because he is rich; I hold in contempt no man because he is poor.

The history of the world shows that when a mean thing was done, man did it; when a good thing was done, man did it.

Is not the history of real civilization the slow and gradual emancipation of the intellect, of the judgment, from the mastery of passion? Is not that man civilized whose reason sits the crowned monarch of his brain - whose passions are his servants?

Talent has the four seasons: spring, that is to say, the sowing of the seeds; summer, growth; autumn, the harvest; winter, intellectual death. But there is now and then a genius who has no winter, and, no matter how many years he may live, on the blossom of his thought no snow falls. Genius has the climate of perpetual growth.

Courage without conscience is a wild beast.