Anything capable of being imagined will one day be made reality.

Man is never perfect nor contented.

In presence of Nature's grand convulsions man is powerless.

Science, my lad, is made up of mistakes, but they are mistakes which it is useful to make, because they lead little by little to the truth.

While there is life there is hope. I beg to assert...that as long as a man's heart beats, as long as a man's flesh quivers, I do not allow that a being gifted with thought and will can allow himself to despair.

Nothing is more dreadful than private duels in America. The two adversaries attack each other like wild beasts. Then it is that they might well covet those wonderful properties of the Indians of the prairies - their quick intelligence, their ingenious cunning, their scent of the enemy.

Everything is possible for an eccentric, especially when he is English.