"You must also remember that the world has God to govern it, and He has not left it to our charity. The Lord God is its Governor and Maintainer, and in spite of these wine fanatics and cigar fanatics, and all sorts of marriage fanatics, it would go on. If all these persons were to die, it would go on none the worse."

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'Men die of the diseases which they have studied most,' remarked the surgeon, snipping off the end of a cigar with all his professional neatness and finish. 'It's as if the morbid condition was an evil creature which, when it found itself closely hunted, flew at the throat of its pursuer. If you worry the microbes too much they may worry you. I've seen cases of it, and not necessarily in microbic diseases either. There was, of course, the well-known instance of Liston and the aneurism; and a dozen others that I could mention.'

— Arthur Conan Doyle