I consider philosophy an indispensable basis for dealing with the most important questions of our existence. However, what follows is not a complete treatise of philosophy; it is a selection of philosophers and subjects, mainly aimed at explaining the “anti-metaphysical” point of view. Those who don’t understand the meaning of this term should not be discouraged: the following chapters are just to explain it as easily and clearly as possible. I had the pleasure of being told by some people that they finally figured out some things about philosophy, that they had already studied in the past, only now, after having read this book. Actually I think that the synthesis, that I am presenting here, will allow to understand some concepts that philosophical treatises do not explain, in my opinion, with sufficient clarity and simplicity.