“But how much are the delicate convolutions of the brain influenced by the digestive apparatus? When the mal de mere seizes me I, Hercule Poirot, am a creature with no grey cells, no order, no method — a mere member of the human race somewhere below average intelligence!”

“I am a brain, Watson. The rest of me is a mere appendix.”

“To me it is quite credible that the Martians may be descended from beings not unlike ourselves, by a gradual development of brain and hands (the latter giving rise to the two bunches of delicate tentacles at last) at the expense of the rest of the body. Without the body the brain would, of course, become a mere selfish intelligence, without any of the emotional substratum of the human being.”

““You do well. Method and order, they are everything,” replied Poirot.”

“It is the brain, the little gray cells on which one must rely. One must seek the truth within--not without." ~ Poirot”

“I welcome each new day with a hopeful expectancy that I, too, will rise above the ordinary. For I am not content to live a merely "normal" life or settle for an average existence. No, I am destined for more--much, much more.”

“Surely if a single cell may, when subjected to certain influences, become a man in the space of twenty years; there is nothing absurd in the hypothesis that under certain other influences, a cell may, in the course of millions of years, give origin to the human race.”

“Take this Hercules — this hero! Hero, indeed! What was he but a large muscular creature of low intelligence and criminal tendencies!”

“I am writing in the garden. To write as one should of a garden one must write not outside it or merely somewhere near it, but in the garden.”

“Even the brain, that most delicate and complex of all known organs, is not merely a lot of neurons added together. While a genius must have more of the gray matter than a sparrow, the idiot may have just as much as the genius. The difference between them must be explained in terms of how those substances are organized.”