The problem is we don't hear directly from any gods. We only hear all this from fallible mortals, like yourself, who could be mistaken. So your say so isn't good enough.God is the best reward, power comes from him, higher ranks are attained with respect to him in the next world.
He is the best being to prove yourself to and to get to know. And we all die and so this world reputation and ranks go out the window and become forgotten.
So those are among reasons to live for God.
But I'm saying - people can't live for God if they doubt him. So why not reach out to God to remove the doubt. And why not research religions and take a bet with the more rational one, and try to seek an intermediation through it's chosen ones as well and ask God to intervene and remove the doubt?
You offer no facts of cause and effect. You only recite beliefs that seem directed at yourself so you can be more convinced yourself that you believe.
It is actually doubt that gives us clarity, because then we can start asking questions to distill truth from dogmas. Your appeals to reject doubt is what coercion does. This only works on weak, susceptible minds who are seeking some sort of meaning and significance beyond their own, personal authority and executive function. What makes this dangerous is how these kinds of believers can be manipulated and coerced by leadership for tasks that are supposedly "God's will". We have seen this before, how believers who do NOT doubt will do evil acts against innocent people for the sake of God.