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

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

“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.”

“Evolution isn't 'survival of the fittest,' for Christ's sake. In the long run, linearly, it's survival of the most prolific.”

“The fittest of the fittest shall survive !”

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