B. G. Jefferis and J. L. Nichols, Searchlights on Health — Knowledge is Safety (1919)
“ The old maxim, that "Knowledge is power," is a true one, but there is still a greater truth: "KNOWLEDGE IS SAFETY." Safety amid physical ills that beset mankind, and safety amid the moral pitfalls that surround so many young people, is the great crying demand of the age. ”
