I don't know how is your life at this present moment, your job, your achievements, your wishes, your relationships. But I believe when everything is working, a feeling of happiness can involve you based on all good about yourself.
Growing in confidence and strength seem to be easier when your gifts and skills are utterly developed and used through your life's work.
ECCLESIASTES 5:19
" Moreover, when God gives people wealth and possessions, and the ability to enjoy them, to accept their lot and be happy in their toil—this is a gift of God. "