Psychological problems differ from person to person, but at the foundation of these problems lie four fundamental mistakes that each of us makes. We worry because of an illusion of danger, we get disappointed because of an illusion of happiness, we suffer because of the same-named illusion, and we conflict with others because of an illusion of mutual understanding. These illusions are hidden in our subconscious and cost us far too much. So if we truly want to be happy, we need to know these “classic mistakes” and have an instruction manual for fighting them. You’ll find both in this book.