Can nature make us happy? How can we know anything? What is justice? Whyis there evil in the world? What is the source of truth? Is it possiblefor God not to exist? Can we really believe what we see? There arequestions that have intrigued the world's great thinkers over the ages,which still touch a cord in all of us today. They are questions that canteach us about the way we live, work, relate to each other and see theworld. Here, one of the world's greatest living philosophers, LeszekKolakowski, explores the essence of these ideas, introducing figures fromSocrates to Thomas Aquinas, Descartes to Nietzsche and concentrating onone single important philosophical question from each of them. Whetherreflecting on good and evil, truth and beauty, faith and the soul, or freewill and consciousness, Kolakowski shows that these timeless ideas remainat the very core of our existence.