This introductory course deals with some philosophers from the ancient Greek tradition. We will explore problems, questions and ideas raised by these philosophers, who have enduring influence and relevance. Specific questions that we will discuss in the context of this task include: • What is philosophy and how should we approach doing philosophy? • What principles should we adhere to when dealing with philosophical texts? • Can you step into the same river twice? • Can we ever investigate anything? If so, how do we go about it? • To what extent are we responsible for our actions?