Upton Sinclair,
Good Health and How We Won It, With an Account of the New Hygiene
“ If we stop to think for a moment, we realize that next to the air we breathe, and the water we drink, our food is the most important consideration in the maintenance of life. All this is the veriest commonplace; yet the fact remains that it is very rarely indeed that we do stop to think upon the subject of our food. It is something that we take for granted, like life itself. In the regular routine of our days our meals become fixed habits, and the taking of food an almost involuntary custom. ”
