Galen Quotes
Employment is nature's physician, and is essential to human happiness.
"Day's Collacon: an Encyclopaedia of Prose Quotations". Book by Edward Parsons Day, p. 223, 1884.
Galen, Arthur John Brock (1991). “On the natural faculties”, Loeb Classical Library
Galen, Arthur John Brock (1991). “On the natural faculties”, Loeb Classical Library
"Arabian Society In The Middle Ages". Book by by Edward William Lane, 1883.
Galen (1916). “Galen On the Natural Faculties”
Galen, Arthur John Brock (1991). “On the natural faculties”, Loeb Classical Library