The reply, "We all want the fullness of happiness in our lives but then if we never know sadness or hopelessness, we'll forget to cherish it. So God gave us the means to keep on collecting happiness by tipping the bottle every so often, so that we may again find the joy of rediscovering our happiness and also to share it with others."
Remember it is the act of pursuing happiness that is the key to life and not the the end that should be valued. So share some happiness to those that don't have it and be enriched yourselves. Merry Christmas and a happy new year to all.