To love 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 to an animal. Wrap it carefully round with hobbies and little luxuries; avoid all entanglements; lock it up safe, motionless, airless –it will change. It will not be broken. It will become unbreakable, impenetrable, irredeemable.
C.S. Lewis

Thanks to Rose Starr for passing along this amazing quote.