god believes in you

Even if god believes in you, there is no reason why you must or should reciprocate.
You have asked a question that is inherently in conflict.
Why (just the question part)
I (meaning you a sentient being of your own force and control in essence a god).
should(implies constraingin,containing, or directive force, control over yourself a god) The phrase "believe in god" is just a red herring. The question is already in conflict as you question why you should submit your godlike force. Whether that submission is provided to another person/god or the force of gravity or to an unknown invisible hand created by the Einstein/God to control the cosmos is all a red herring that ultimately can only lead to your enslavement. Rule thy self to avoid slavery!