"The Four Agreements" is a best-selling book by Mexican author Don Miguel Ruiz who gave four principles to live by to be happy in life: speak with integrity, always do your best, do not take anything personal and do not make assumptions. The book was published in 1997.
"The Four Agreements" is based on the ideas that came from the old Toltec wisdom of people from Southern Mexico. They were considered "the people of knowledge" who created a society of artists and scientists to explore the spiritual knowledge of their forefathers. The book has been translated into 38 languages all around the world. It was also featured on the "The Oprah Winfrey Show."