This document provides an introduction to the philosophy of the human person. It defines philosophy as the love of wisdom and the science that studies first causes and principles of all things using natural reason. The main branches of philosophy are discussed, including metaphysics, ethics, epistemology, logic, and aesthetics. Examples of influential philosophers in each branch like Plato, Aristotle, and Kant are provided. The document concludes with discussion questions about the importance and applications of philosophy.