To love at all is to be vulnerable. Love anything, and your heart will certainly be wrung and possibly broken. If you want to make sure of keeping it intact, you must give your heart to no one. Not even an animal. Wrap it carefully with hobbies and luxuries, avoid all entanglements and keep it safe in the casket of your selfishness. But in the casket - safe, dark, motionless, airless - it will change. It will become unbreakable, impenetrable, irredeemable.
- C.S Lewis The Four Loves