“I do not think there is any other quality so essential to success of any kind as the quality of perseverance. It overcomes almost everything, even nature.”

“Optimism is the one quality more associated with success and happiness than any other. ”

“I think that the most necessary quality for any person to have is imagination. It makes people able to put themselves in other people's places. It makes them kind and sympathetic and understanding.”

“Are men and beasts of the same category? Is there no essential difference between them in respect to the quality of their value?…It is an offense to the majesty of the human spirit; for if any man deserves to be regarded as of the same quality as a beast of burden, then no man has any dignity left.”

“Man, before he is being regenerated, does not even know that any internal man exists, muchless is he acquainted with its nature and quality.”

“The essential quality of life is living' the essential quality of living is change; change is evolution; and we are part of it.”