The world we live in is primed for human achievement and a never-ending barrage of opportunity for the glory of man.  For those who don't believe in God, they have had to redefine their purpose on earth, but yet can only live for today with no hope for tomorrow.  The endless need for success will leave them without rest and a denial the vain reality of human striving. For the Christian, our work on earth can not only lead to satisfying happiness, but it has been designed by God to be united with His eternal plan.