The ideal of the supreme being is nothing but a regulative principle of reason which directs us to look upon all connection in the world as if it originated from an all-sufficient necessary cause.
In the moment when you make the least petition to God, though it be but a silent wish that he may approve you, or add one moment to your life,--do you not, in the very act, necessarily exclude all other beings from your thought? In that act, the soul stands alone with God, and Jesus is no more present to your mind than your brother or your child.
The universe is large and we are tiny, without the need for further religious superstructure. One can have so-called spiritual moments without belief in the spirit.
When you find your path, you must not be afraid. You need to have sufficient courage to make mistakes. Disappointment, defeat, and despair are the tools God uses to show us the way.