Ruiz explains that while this agreement is the most important, it is the most difficult to respect.  For this agreement, Ruiz first analyzes the word “impeccable.” The word impeccable comes from the Latin word peccatus, which means “sin,” and the “im” at the beginning of impeccable is the Latin prefix meaning “without.” Ruiz describes a sin as anything that goes against oneself, and therefore it means being impeccable with language, taking responsibility for one`s actions, and remaining without judgment against oneself and others.  Essentially, this agreement emphasizes the importance of speaking eloquently and carefully choosing words before they are spoken aloud.  “The third agreement is not to make assumptions. We tend to make assumptions about everything. The problem with assumptions is that we believe they are the truth. We could swear they are real. “There is only one agreement left, but it is the one that allows the other three to become deep-rooted habits. The fourth agreement concerns the action of the first three: always give the best of yourself. The fourth agreement gives readers a better insight into the progress made in achieving their life goals. This agreement includes the integration of the first three chords into everyday life and also the exhaustion of one`s own potential.  It is a question of doing one`s best individually, which is different from the different situations and circumstances that the individual may encounter. Ruiz believes that if you avoid self-judgment and do your best in every given moment, you will be able to avoid remorse.
 By incorporating the first three chords and giving the best of himself in all facets of life, the individual will be able to live a life without grief or self-irony.  Integrate this agreement to help you in your work: ask more questions, be patient, reflect, communicate better with others. Avoid assumptions by using active listening and assertive communication. Relieve the facts, cool your emotions for at least three days before acting compulsively. To integrate the first agreement into the office: talk less and do more. Exceed your own expectations in terms of meeting your obligations. Pay attention to your thoughts. Evaluate before you speak. 70% listen and only 30% speak. Try to be more precise in your language to express all your ideas appropriately. Avoid injury and focus on improving your interactions with others and adding value.
Throw away any aggressive communication in your life. The third agreement describes the question of assuming how this leads to suffering and why individuals should not participate in its encounter. Accepting what others think can lead to stress and interpersonal conflict because the person believes that their hypothesis is a representation of the truth.  Ruiz believes that one solution to overcome the act of acceptance is to ask questions and ensure that communication between those involved is clear.  Individuals can avoid misunderstandings, sadness and drama by not making assumptions.  To integrate this second agreement into your work environment: learn from differences with others; integrates and respects the decisions of others. Understand that the other is “another” with their own problems, beliefs, and difficulties. If something bothers you, find the right space and express it clearly from your point of view (take charge of your communication, don`t blame others).
Don`t try to impose your desires on the opinions of others. Always consider the greater good of all in all situations. Avoid living on the ego: learn compassion, humility, conscious listening, open-mindedness to have better experiences. This will help you have more peace in all aspects. It depends on where you look at it, the four chords are very simple and at the same time very deeply expressed. “The first agreement is the most important and also the most difficult to achieve. It is so important that with this first agreement you can transcend to the level of existence that I call heaven on earth. The first agreement is to be impeccable with your word. “The next three agreements were really born from the first agreement.
The second agreement is not to take anything personally. The Four Accords©, were published in 1997 and have sold about 9 million copies. .