“For several thousand years man has been in contact with animals whose character and habits have been deformed by domestication. He has ended by believing that he understands them. All he means by this is that he is able to rely on certain reflex actions which he himself has implanted in them. He will flatter himself at times on the grasp of animal psychology which has brought him the love of the dog and the purr of the cat; and on the strength of such assumptions he approaches the beasts of the jungle. The old tag about nature being an open book is just not true. What nature offers on a first examination may appear to be simple but it is never as simple as it appears.”

“Man has been reared by his errors: first he never saw himself other than imperfectly, second he attributed to himself imaginary qualities, third he felt himself in a false order of rank with animal and nature, fourth he continually invented new tables of values and for a time took each of them to be eternal and unconditional...If one deducts the effect of these four errors, one has also deducted away humanity, humaneness, and 'human dignity'.”

“Man hates something in himself. He has been able to defeat every natural obstacle but himself he cannot win over unless he kills every individual. And this self-hate which goes so closely in hand with self-love is what I wrote about. - in a letter to George Albee”

“Man is a Religious Animal. He is the only Religious Animal. He is the only animal that has the True Religion--several of them. He is the only animal that loves his neighbor as himself and cuts his throat if his theology isn't straight. He has made a graveyard of the globe in trying his honest best to smooth his brother's path to happiness and heaven....The higher animals have no religion. And we are told that they are going to be left out in the Hereafter. I wonder why? It seems questionable taste.”

“Do you know that when one who has influence with youth- be he teacher, leader or parent- seriously weakens the foundations upon which a young person has built, by faith-destroying challenges the youngster is not yet equipped to meet, he fashions a disciple who has been effectively cut loose from fundamentals at a time when he needs most to rely on them? The challenger may himself be a moral, educated, well-meaning person of integrity, doing what he does in the name of honesty and truth. His own character may have been formed in an atmosphere of faith and conviction which, through his influence, he may now help to destroy in his young follower. "Disenchanted" himself in his mature years, he turns his powers on an immature mind and leaves it ready prey for nostrums and superstitions and behavior he himself would disdain.”

“When man learns to understand and control his own behavior as well as he is learning to understand and control the behavior of crop plants and domestic animals, he may be justified in believing that he has become civilized.”