John Brown, Health: Five Lay Sermons to Working-People
“ One person I would earnestly warn you against, and that is the Quack Doctor. If the real Doctor is a sort of God of healing, or rather our God's cobbler for the body, the Quack is the Devil for the body, or rather the Devil's servant against the body. And like his father, he is a great liar and cheat. He offers you what he cannot give. Whenever you see a medicine that cures everything, be sure it cures nothing ”
