“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.”

“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.”

“If you eliminate suffering from this world you eliminate life. There's no evolution. Those species that don't suffer don't survive. Sometimes the insane and the contrarians and the ones who are the closest to suicide are the most valuable people society has. They may be the precursors of social change. They've taken the burdens of the culture onto themselves and in their struggle to solve their own problems they're solving problems for the culture as well”

“The selective voluntary blindness of human beings allows them to ignore the moral consequences of their choices. It has been one of the species' most valuable traits, in terms of the survival of any particular human community.”

“The strongest natures, when they are influenced, submit the most unreservedly; it is perhaps a sign of their strength.”