The Four Agreements: A Practical Guide to Personal Freedom is by Miguel Ruiz.
A year ago, almost to the day, the hurt I was going through caused by a breakup came to head. There seems to be a theme of writing letters to those who’ve hurt you in order to heal oneself. I’ve written numerous letters, not all of which got sent. I hid more letters than I sent out to the universe towards this person, and many more letters that I wrote to others (again, not all were sent) who only helped to heighten the pain, hurt, and betrayal. This time I decided to write a letter to share with all of you about my thoughts and feelings regarding what happened, and I hope those involved read it and take it to heart, too.
The First Agreement: Be impeccable with your word. Speak with integrity. Say only what you mean. Avoid using the word to speak against yourself or to gossip about others. Use the power of your word in the direction of truth and love.