In your whole life nobody has ever abused you more than you have abused yourself. And the limit of your self-abuse is exactly the limit that you will tolerate from someone else. If someone abuses you a little more than you abuse yourself, you will probably walk away from that person. But if someone abuses you a little less than you abuse yourself, you will probably stay in the relationship and tolerate it endlessly.
Monday Morning Coffee for the Soul
c/o Don Miguel Ruiz in The Four Agreements