“It is not the strongest of the species that survives, nor the most intelligent, but the one most responsive to change.”

“It is not the strongest or the most intelligent who will survive but those who can best manage change.”

“The law of evolution is that the strongest survives!' 'Yes, and the strongest, in the existence of any social species, are those who are most social. In human terms, most ethical...There is no strength to be gained from hurting one another. Only weakness.”

“The miracle is that, in most cases, he succeeds - for the powers of survival, of the will to survive, and to survive as a unique inalienable individual, are absolutely, the strongest in our being: stronger than any impulses, stronger than disease.”

“Intelligence is based on how efficient a species became at doing the things they need to survive.”

“A wiser intelligence might now truthfully say of us at this point: here is a chimera, a new and very odd species come shambling into our universe, a mix of Stone Age emotion, medieval self-image, and godlike technology. The combination makes the species unresponsive to the forces that count most for its own long-term survival.”