Since genius is scattered across the centuries, anyone philosophically engaged does well to ponder the teachings of at least some great earlier philosophers. Yet, historicists argue that each philosophy is temporally bound, contemporary analytic philosophers are apt to draw negative conclusions about the value of past philosophy for forming a justifiable conception of reality, and champions of a scientistic world-view dismiss all philosophy uninformed by the latest discoveries. In Sullivan and Pannier challenge these skeptical arguments and illustrate concretely the power of past philosophy to invigorate the mind and its philosophic products. They cast doubt, through abstract argument and concrete illustration, on the wisdom of treating all earlier systems and theories as useless patrimony of long dead elders.