ORIGINAL BOOK DESCRIPTION: In this book, it is shown that our thinking is conditioned by a series of principles that guide our decision making, even if it is not the one that suits us best, and may even seem irrational. The book develops six fundamental principles that are useful in life. These principles are constantly used by those who try to convince us to do something that suits them, even if it goes against our own interests. These six rules are based on taking advantage of some of the behaviour patterns internalised collectively by the human psyche in order to influence the behaviour of an interlocutor. In these pages, you will learn how those who try to persuade you will act, and you will be able to take control of your own decisions and escape from those that are not beneficial to you.