His new book is The Fifth Agreement. I've not read the book yet, but here's the agreement:
Here's another quote from the book:Be skeptical, but learn to listen.
Don't believe yourself or anybody else. Use the power of doubt to question everything you hear: Is it really the truth? Listen to the intent behind the words, and you will understand the real message
Here's an article that brings up some good points about how we see ourselves -- and whether or not what we see is the truth.The truth doesn't need you to believe it; it simply is.