It is certain that the inanimate objects by which you are surrounded have a direct action on the brain.

Dost thou know what life is, my child? Hast thou comprehended the action of those springs which produce existence? Hast thou examined thyself?

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.

In the United States, there is no project so audacious for which people cannot be found to guarantee the cost and find the working expenses.

I don't believe in blaming inanimate objects for anything.

Far better to be the simplest pedestrian, with knapsack on back, stick in hand, and gun on shoulder, than an Indian prince travelling with all the ceremonial which his rank requires.