Why don't you just follow traditional religion? God the holy spirit chooses, and the existence of God is a matter of opinion. And in the same way, the soul of someone chooses, and the existence of the soul is a matter of opinion. Then when you die, who you are as being the owner of all your decisions, your soul, is judged by God.
That way you validate both opinion and fact. You have facts in regards to what decisions are made, and you have opinions in regards to God and what is in your soul.
An opinion is made by choosing the conclusion. Assuming God exists as you do, has no religious meaning, it is not believing, it is not faith. You have to choose the answer that God is real. When you choose it, then it is faith.