Do not forget to do good and to share with others, for with such sacrifices God is pleased. ~ Hebrews 13:16
How else will the world truly know God if you don't show Him to others? Don't hoarde God's spirit, it is meant to be given - not trapped and kept.
A man's soul will never be as full as when he gives himself away in the service to someone in need.
Find purpose in your day by choosing to give yourself away in some form. Give away a kind word, a gift of food - clothing - or shelter, or perhaps a few moments of your time to listen to someone's struggle.
Your joy and happiness can easily be found when you give away - joy and happiness.