“But one way or another competing and weeding takes place . . . or a race goes downhill.”

“A society that gets rid of all its troublemakers goes downhill.”

“A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.”

“One man's theology is another man's belly laugh.”

“...the word 'love' designates a subjective condition in which the welfare and happiness of another person are essential to one's own happiness.”

“The commonest weakness of our race is our ability to rationalize our most selfish purposes.”

“The human race divides politically into those who want people to be controlled and those who have no such desire.”