Ruiz acknowledges that it is difficult to leave behind rules, regulations and restrictions throughout his life. But if we break the agreement with the great dream and the multitude of small agreements that have been made a lifetime, and we adapt new agreements in their place – agreements that correspond to the individual – the real person will be born, and that newly liberated person will be able to find truth and happiness. The four chords are: always speak perfectly, take nothing personally, do not make assumptions and always do your best. The fourth agreement allows readers to have a better understanding of the progress made in achieving their goals in life. This agreement involves the integration of the first three agreements into daily life and the exploitation of its own potential.  It is a matter of doing the best that can be managed individually, which varies from the different situations and circumstances that the individual may encounter. Ruiz believes that if you judge yourself and do your best at all times, you will be able to avoid remorse.  By integrating the first three chords and doing the best in all facets of life, the individual will be able to lead a life without grief or self-awareness.  Use this exercise to identify some steps you can take to remove some of the old agreements that will hold you. The second chord seems strangely simple: “Don`t take anything in person.” But so many of us are sensitive and defensive, designed to repel the negativity that the world throws at us. The world is full of misery and suffering. We are each other, but even harder on ourselves. Too many of us are dissatisfied, unhappy, joyless.
In addition to demhur`s book and book, there is also an eBook, a four-colour picture book, a card game and an online course.  Making assumptions and taking things in person (two and three agreements) go hand in hand, leading to gossip, conflict and suffering. This final agreement will allow the other three to become more entrenched and effective. Finally, the first three chords can only really work if you do your best day after day. These first two agreements free you from many bad arrangements that have disrupted your life. Finally, carefree words, combined with very ardent people, will inevitably bring drama. There are three ways to break with our old bad arrangements: the book is inspired by a series of spiritual beliefs, held by the old Toltec, to help readers transform their lives into a new experience of freedom, true happiness and love.  According to the author, everything a man does is based on agreements he has made with himself, with others, with God and with life itself.
 In these agreements, we can tell ourselves who they are, how to behave, what is possible and what is impossible.  Some agreements that create individuals may not cause problems, but there are certain arrangements that come from a place of fear and have the power to deplete emotional energy and reduce a person`s self-esteem.  The book states that these self-limiting agreements cause unnecessary suffering.  Ruiz also believes that to find personal joy, one must get rid of socially imposed and fear-based agreements that can unconsciously influence the individual`s behaviour and thinking.  Another fundamental premise of the book suggests that much of the suffering is created and that most people have the ability to transform themselves and the negative thoughts they have about the situations in their lives.  The author identifies the sources of unhappiness in life and proposes four beneficial agreements that can be concluded with oneself to improve their general state of well-being.