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.
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3.2.20
Imagine everyone would wake up in the morning have twice as much money. Would anything change? No. Rent would double. Prices would double. Nothing has been added.