Human life, then, is fraught with meaning, with transcendence. It is not empty. It is not trivial. It is not mere mechanics. – Elisabeth Eliot
I think we all live as though what we do has meaning. What differs for the Christian, as opposed to the secular, is the conviction of transcendence. There is an importance, a gravity to our lives larger than our lives themselves- and this belief shapes our action and outlook enormously.