This document provides an introduction to philosophy by discussing its origins and some notable ancient Greek philosophers. It begins by defining philosophy as the love of wisdom and explains how the ancient Greeks pioneered various fields of knowledge through philosophical inquiry. Several pre-Socratic philosophers are mentioned, including Pythagoras, Heraclitus, and Democritus, followed by Diogenes of Sinope and Epicurus. The major philosophers Socrates, Plato, and Aristotle are then discussed briefly for their significant contributions to ethics, metaphysics, and logic respectively. The document concludes by outlining activities for students to further engage with the concepts.