“That's the problem with survival of the fittest ... the corpse at your fett. That little inconvenience.”

“That's the trouble with survival of the fittest, isn't it, Dominick? The corpse at your feet. That little inconvenience.”

“The fittest of the fittest shall survive !”

“When you're the sane brother of a schizophrenic identical twin, the tricky thing about saving yourself is the blood it leaves on your hands--the little inconvenience of the look-alike corpse at your feet. And if you're into both survival of the fittest and being your brother's keeper--if you've promised your dying mother--then say so long to sleep and hello to the middle of the night. Grab a book or a beer. Get used to Letterman's gap-toothed smile of the absurd, or the view of the bedroom ceiling, or the indifference of random selection. Take it from a godless insomniac. Take it from the uncrazy twin--the guy who beat the biochemical rap.”

“It is meant to be survival of the fittest, not survival of the most floral.”

“Genetics might be adequate for explaining microevolution, but microevolutionary changes in gene frequency were not seen as able to turn a reptile into a mammal or to convert a fish into an amphibian. Microevolution looks at adaptations that concern the survival of the fittest, not the arrival of the fittest... The origin of species — Darwin’s problem — remains unsolved.”