“If evolution exists in every living species, likewise so too does devolution.”

“Evolution requires intermediate forms between species and palaeontology does not provide them.”

“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.”

“Man wants to see nature and evolution as separate from human activities. There is a natural world, and there is man. But man also belongs to the natural world. If he is a ferocious predator, that too is part of evolution. If cod and haddock and other species cannot survive because man kills them, something more adaptable will take their place. Nature, the ultimate pragmatist, doggedly searches for something that works. But as the cockroach demonstrates, what works best in nature does not always appeal to us.”

“Accepting evolution does not force us to jettison our morals and ethics, and rejecting evolution does not ensure their constancy.”

“If every word introduces a new concept, the simple phrase "all that which does not exist" is sufficient to make everything that does not exist, exist.”