An average American loves his family. If he has any love left over for some other person, he generally selects Mark Twain.

An idea is something that won't work unless you do.

Many a person who could not comprehend Rousseau, and would be puzzled by Montesquieu, could understand Paine as an open book. He wrote with a clarity, a sharpness of outline and exactness of speech that even a schoolboy should be able to grasp.

The memory of my mother will always be a blessing to me.

Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.

I never did anything by accident, nor did any of my inventions come by accident; they came by work.

Success is the result of hard work.