People need a reason to live, and resources for living:
It is not uncommon to find people without a reason for living. They simply exist until they can bear it no longer, or they fill their emptiness with meaningless pursuits. Other people have reasons for living, but no resources for living. Once they attain to their reason for living they are left disappointed or strangely empty.
Many astronauts in America’s space program experienced this. Jim Irwin said his whole life revolved around the mission to land on the moon. Once the mission was completed, he experienced a severe depression. He concluded that the only lasting reason for living had to be found in God, and so he became a Christian. Two other astronauts who went on the moon also became believers and are involved in Christian ministries.