You do not have to be a student of philosophy or metaphysics, nor be interested in them, to read this book. The famous Spanish philosopher simply and deeply delve into a series of ideas closely related to our daily lives, and from there he sets out to explain metaphysics and our need or lack thereof. "For metaphysics itself is nothing but what man does. What you and I do in our lives, and this life is ultimately something prior and comes before everything that metaphysics will reveal to us. In these lectures of his, which he delivered to his students in a regular semester, every reader will find An introduction to understanding the world and understanding itself, and everyone interested in philosophy will find a rich engagement with two main trends in the history of philosophy: realism and idealism.