He is not God of the dead, but of the living. Luke 20:38
Are you dead or alive? We are alive through the Spirit but we are not alive when we live for ourselves. God gives us life but we can deny that life. We can deny the life that God wants desperately to give us in exchange for a life made in our own image. The life that God has for us is not for us; it is for all of the relationships that God gives us.
We can imagine happiness in our life or through our life. There is a difference between just experiencing happiness and creating happiness in our life through another. The fleeting happiness that we create just for ourselves is not fulfilling and will eventually create a sense of false fulfillment. The world tells us that happiness equals success without delineating the source of the happiness. God tells us that the source of our happiness matters because the life he gives us gives life to all but the life that we mold in our own image gives life only to ourselves.