"For conservation to be successful it is necessary to take into consideration that it is a characteristic of man that he can only be relied upon to do anything consistently which is in his own interest. He may have occasional fits of conscience and moral rectitude but otherwise his actions are governed by self-interest. It follows then that whatever the moral reasons for conservation it will only be achieved by the inducement of profit or pleasure."

“It looks as if it was put in by an Indian.”

“You managed not to get eaten then?”

“If we are to exercise our responsibilities so that all life can continue on earth, they must have a moral and philosophical basis. Simple self-interest, economic profit and absolute materialism are no longer enough... It has been made perfectly clear that a concern for any part of life on this planet — human, plant or animal, wild or tame — is a concern for all life. A threat to any part of the environment is a threat to the whole environment, but we must have a basis of assessment of these threats, not so that we can establish a priority of fears, but so that we can make a positive contribution to improvement and ultimate survival.”

“You can't have been here that long—you haven't got a pot belly.”

“The man who invented the red carpet needed his head examined.”

“Have you run over anybody?”