Philosophical Ideas: A Historical Study invites the reader to consider central ideas from Plato, Hegel, Vico, and Cassirer from points of view that have not been fully articulated in the most frequently encountered interpretations of their works. It is an examination of the ideas of poetics, dialectics, science, and symbol as they function in their works with focus on the problem of knowledge as present in each of them. The history of philosophy, approached in this way, is a treasure house of ideas that constitutes the subject matter of the contemplative life.