“For those who believe, no proof is necessary. For those who don't believe, no proof is possible.”

“Attitude is your acceptance of the natural laws, or your rejection of the natural laws.”

“People above the line of bare subsistence in this age, and in all earlier ages, do not use the surplus which society has given them primarily for useful purposes. They do not seek to expand their lives, to live more wisely, intelligently, understandingly, but to impress other people with the fact that they have a surplus.”

“For those who believe, no proof is necessary. For those who don't believe, no proof is possible.”