from The Four Loves

To love at all is to e vulnerable. Love anything, and your heart will certainly be wrung and possibly be broken. If you want to make sure of keeping in 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 in the casket or coffin of you selfishness. But in that casket - safe, dark, motionless, airless - it will change. It will not be broken; it will become unbreakable, impenetrable, irredeemable.

C.S.LEWIS (1898-1963)