Belief in God is rational.
Everything has a cause. So unless there is a first cause, then you would have an infinite regress. And then nothing could exist. Therefore there must be a first cause. Therefore God, the first cause, exists. QED.
This is another old file from long ago. I just decided to share old files with people since I am not writing anything new. I am what Rav Nahman calls in מוחין דקטנות [a state of a fallen mind.]