A single pulse of anger or of fear may make more trouble with the contents of your stomach than the doctor's pepsins and digestive ferments can remedy in a week.
"The Book of Life: Vol. I Mind and Body; Vol. II Love and Society"
Upton Sinclair
I neither nibble nuts like a squirrel, nor grapes like a bird-I care nothing for all this jargon about pepsins and proteids and all the rest of it.
"The Explorer"
W. Somerset Maugham