“Try and vary your methods as you will, your tastes, your habits, your attitude of mind, and your soul is revealed by your actions.”

“There speaks the passion and the rebellion that go with red hair. My second wife had red hair. She was a beautiful woman, and she loved me. Strange, is it not? I have always admired red-haired women. Your hair is very beautiful. There are other things I like about you. Your spirit, your courage; the fact that you have a mind of your own.~Mr. Aristides”

“If only-if only, Hastings, you would part your hair in the middle instead of at the side! What a difference it would make to the symmetry of your appearance. And your moustache. If you must have a moustache, let it be a real moustache-a thing of beauty such as mine.”

“Use that fluff of yours you call a brain.”

“You should employ your little grey cells”

“Your not reliable. You wouldn't be at all a comfortable sort of person to live with.”

“Excuse me, Monsieur Poirot. If you'd like to ask any questions, I'm sure the doctor wouldn't mind.Of course not. Of course not. Great admirer of yours, Monsieur Poirot. Little gray cells -- order and method. I know all about it.”