"Her chief contribution to the inheritance of the race has been that, besides demonstrating in action the full perfection of the allied arts of nursing and sanitation, she has left in her writings a philosophy, as it were, of nursing, together with an intellectual demonstration of the scientific and natural basis of hygiene and its practical application, and has laid down once and for all their essential underlying principles with a clarity, a logic, an originality, and a depth of reflection that mark the genius and place her works among the classics."