Most of us have grown up and spoken a language that encourages us to identify, compare, demand and make judgments, instead of being aware of how we feel and what we need. To that end, Ruiz proposes four new agreements that they can conclude today with themselves: just tell you what you mean and only mean what you say. If in doubt, don`t say anything. To do their best is to enjoy the action without expecting a reward. The fun comes from doing what you love in life and having fun, no reward or compensation. Take advantage of how far you`ve come and the goal will take care of you. Living right now and letting go of the past helps us do what we can best right now. It allows us to be fully alive now, to enjoy the present and not to worry about the past or the future. Be patient with yourself.
Be consistent and persevering with helpful measures. If you always do your best, the transformation will occur naturally. Why not try to break one of the hundreds or thousands of agreements you have now? Maybe you`re thinking you`re not good at painting — break the watercolors and have fun creating something. By gradually continuing the process, you can change things gradually for the better. 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.
 If you personally take things away, you are vulnerable. Everyone is infected with some kind of emotional poison from his childhood. Your venom can contaminate you and make you sick. That`s what happens when you`re angry, possessed or insulted. Not taking things personally is like a vaccine that makes you safe from the emotional poison of others, so you can easily move around the world. Children believe everything adults say. That`s why most kids believe in Santa Claus. They are not stupid, they are just very confident. So we took up most of our deepest beliefs, when we couldn`t really think for ourselves. Beliefs about who we are, what the world is and the right way to live. When we are adults, we have unconsciously made a number of agreements (which are not too indespectable of the four agreements).
These agreements guide our behavior – they serve as an internal compass through which we decide what we do and what we don`t. But we never chose those agreements. This book presents four agreements that we should make with ourselves to lead a good life. Replacing our old agreements with these four new ones won`t be easy, but it can be a significant personal change that you can make. The way we make assumptions is because we believe we know what others think and feel. We think we know their point of view, their dream. We forget that our convictions are only our point of view, based on our belief system and personal experience, which have nothing to do with what others think and feel. We assume that everyone judges us, abuses us, harasses us and blames us for the way we do it ourselves.