The purpose of the paper is to investigate into the ethical significance of friendship, beginning with its origins in ancient Greek philosophy. The first part is dedicated to an interpretation of Plato’s understanding of friendship as a way towards the good. The second part focuses on how Aristotle takes up the thread after Plato and elaborates on the potential of friendship to enhance the good between virtuous people. In the final parts, the paper uncovers Friedrich Nietzsche’s posthumous thoughts on “an ethics of friendship”, which he traces back to ancient Greek philosophy, and it offers a concluding critical commentary of three modern thinkers, Hans-Georg Gadamer, Hannah Arendt and Alasdair MacIntyre, who reflect, each in their own way, on the human good in an on-going dialogue with the ancient Greek philosophy of friendship.