This document provides an overview of philosophy. Philosophy comes from the Greek words "philos" meaning love and "sophia" meaning wisdom. It uses human reason to investigate the ultimate causes and principles of all things. Some key branches of philosophy discussed are logic, epistemology, metaphysics, and ethics. Reflection is examined as examining one's thoughts and experiences to gain knowledge. Philosophers like Plato, Descartes, and Jaspers are mentioned regarding their perspectives on philosophizing.