The only place outside of heaven.......

I've been thinking about this quote from C.S. Lewis:

If you want to make sure of keeping your heart intact, you must give your heart to no one, not even to an animal. Wrap it carefully with hobbies and little luxuries; avoid all entanglements; lock it up safe in the casket of your selfishness. But in that casket — safe, dark, motionless, airless — it will change. It will not be broken — it will become unbreakable, impenetrable, irredeemable. The only place outside of Heaven where you can be perfectly safe from the dangers of love is Hell.