Upton Sinclair,
The Fasting Cure
“ If you have any doubt that such fasts are taken, you can very quickly convince yourself. Less than a year ago I saw a man completing a fifty-day fast; I talked with him day by day, and I knew absolutely that it was all in good faith. The symptoms of fasting are as distinct and unmistakable as are, for instance, those of smallpox; you could no more persuade an experienced person that you are fasting when you are not fasting, than you could persuade a bacteriologist that you had sleeping-sickness when you were merely lazy. ”
