I think one of the reasons that certain people have "created" God, in their minds, is because life and the eventual death, are very hard for certain people to accept.
For example, I believe my Father was drawn to "the truth", because he didn't want to believe that we all just were born, and lived, and loved, and laughed, and cried, and all that life has to offer, to then eventually just DIE, and be forgotten. Its a hard "pill" for some to swallow.
Humans try to rationalize that we are here for a reason, and serve a greater purpose. Its hard to believe its all for nothing. Yes, there is joy in our lives. We have and love our children. We cherish and make lasting friendships. We build, and laugh, and create, and destroy, but some just cannot accept that, then we grow old, and die, making it all, kinda for nothing, in the end.
When you TRULY realize how insignificant we REALLY are, in our little corner, of the corner, of the corner, of the speck of dust we live on, it is quite sobering for some. Some look at it, and say " We are truly NOTHING". Others look at that same picture, and say "We truly must be something special".