Ecclesiastes 3:11 says that God has put eternity in the heart of every man. Because of this every man sees his own life as having some meaning or purpose. This ultimately is the great problem an atheistic worldview. Atheists believe that all of life is nothing more than a combination of matter, time, and chance and therefore they also believe that the universe is meaningless. In other words the atheist would say that there is no cosmic meaning in the world. Well if there is no cosmic meaning, then it is impossible to say that there is any sort of personal meaning. In other words if the atheist is going to stay faithful to his own worldview then he has to admit that his own life is meaningless. This of course is something no one is willing to do because like Ecclesiastes tells us God has put an understanding of meaning and eternal purpose in our hearts.