If you honestly and truly do not believe in any power greater than self, you represent about 5% of the species. Now, there are many plausible explanations for such an anomaly in behavior.
As can be seen in many countries in the M.E. to this day, the vast majority of people get down on all fours five times a day because if they don't they are summarily executed.
Perhaps the 5% who don't are the real lovers of God and truth.