If you are not living with a whole heart now, the end of the world poses no threat; your life is already gone. Life is only as valuable as our presence to enjoy it. To miss the beauty of the moment because you are preparing to protect yourself from the next one, is to trade a precious gem for a cheap trinket.
Life does not require you to sacrifice or compromise your joy to get what you want. Joy is what you want, so when you choose in harmony with it, you are fulfilling your purpose in living.