"First, the eight rules of tolerance: 1. Stay out of the way. 2. Don't pick a fight. 3. If challenged, walk away. 4. Avoid eye contact. 5. If your enemy is diurnal, learn to be nocturnal. 6. Vice versa. 7. Possess nothing the other wants. 8. Draw the line at hurting kids: I will fight to the death. After tolerance is achieved comes play. Here are the nine rules of play: 1. Know when to quit. 2. Learn how to handicap. 3. Learn what frightens the other (cat claws). 4. Don't let it get to you. It's just a game; you mustn't take it seriously (cats have trouble with this one—escalation is always a risk in cat games). 5. Don't eat your playmate. 6. Pay attention to the signals on the other side—for instance, “enough” and “quit.” 7. Don't suddenly change the rules. 8. Don't be a sore loser. 9. Remember: It's only a game. And if play succeeds, we can move on to the eight rules of friendship: 1. Learn the rules of your opposite number. 2. Recognize that danger is no longer relevant. 3. Take your time. 4. One step at a time. 5. Apologize often by learning the other's words, gestures, sounds, or postures for “I'm sorry.” 6. Acknowledge mistakes. 7. Make the offer of friendship more than once. 8. Express curiosity about what the other is like."