The awareness of ones existence leads to the realization someday you will cease to exist. Death. This in turn often results in the belief in a higher power.
This existance, and it’s ultimate end becomes explained in a logical fashion, through a strong belief in in something whose existance is unproven. In fact, only exists because of belief.
What if there is no higher power
The search for the meaning of life, the purpose or goal is often explained as a subservience to god. Not a god you can see or talk to but one that only exists in your mind, that is a product of your beliefs.
Without this explanation, our existence is a short trip through a reality of our own making ending in a death, which is not (of our own making). This results in a strong motivation to believe in a higher power.
Such beliefs can be used as a justification for action, who can prove they are untrue? Without this kind of fundemental motivation our lives become little more than a beginning and an end.
Not for everyone
Belief in a higher power, a god if you will, is not for everyone. Personal philosophies that focus on the self, “it’s all about me” represent examples of an alternate approach.
I am here. Let me do all the good I can for myself and others while I travel this road. When it is done, I will have no regrets.