Hume believed that you could separate faith and reason, and pitch faith as far as you could throw it.
"Reason alone" is where people always get on the wrong train that leads them into a vast wilderness where they think they have no need for God or human nature.
That way of thinking gave us nihilism, communism and all the other "-isms" that have led to so much human misery and death.
Because of Hume's faulty thinking, he was never offered a professorship in philosophy. All of the other Scottish professors made sure of that.
It was Thomas Reid's reaction to Hume that created the Common Sense movement.
Hume wrote a history of England that even Thomas Jefferson rejected when he was gathering history books for his students at the University of Virginia and chose instead John Lingard's "History of England," who was a Jesuit.
I can't understand why anyone would still be fascinated with Hume.
The problem is not so much that Hume is wrong in saying that “you cannot derive an ought from an is,” but that no one can possibly live by that maxim.