There is no side of the human mind which physiological study leaves
uncultivated. Connected by innumerable ties with abstract science,
Physiology is yet in the most intimate relation with humanity; and by
teaching us that law and order, and a definite scheme of development,
regulate even the strangest and wildest manifestations of individual
life, she prepares the student to look for a coal even amidst the
erratic wanderings of mankind, and to believe that history offers
something more than an entertaining chaos--a journal of a toilsome,
tragi-comic march nowhither.