“It is a law of nature we overlook, that intellectual versatility is the compensation for change, danger, and trouble. An animal perfectly in harmony with its environment is a perfect mechanism. Nature never appeals to intelligence until habit and instinct are useless. There is no intelligence where there is no change and no need of change. Only those animals partake of intelligence that have a huge variety of needs and dangers.”

“It is a law of nature we overlook, that intellectual versatility is the compensation for change, danger and trouble.... Nature never appeals to intelligence until habit and instinct are useless. There is no intelligence where there is no change and no need of change.”

“Nature never appeals to intelligence until habit and instinct are useless. There is no intelligence where there is no need of change.”

“Intelligence could not thrive where there was no change and no necessity for change.”

“<...> I’venever believed there is any animal more dangerous than a human being. I never will. It’s the intelligence. It’s the mind that makes it so.”

“The difference between animals and humans is that animals change themselves for the environment, but humans change the environment for themselves.”