"The greatest discovery of my generation is that a human being can alter his life by altering his attitudes."

"I am not an optimist, but a man who hopes."

"Constant kindness can accomplish much. As the sun makes ice melt, kindness causes misunderstanding, mistrust, and hostility to evaporate."

"Ethics is nothing else than reverence for life."

"The greatest good is that which is done for the greatest number."