The title explains itself.
But it’s misleading.
There are more than 40 reasons.
In fact, there are at least ten to the 82nd power, which, we are told, is the number of atoms in the universe. And that’s just in ordinary matter, which makes up only 4.9% of the universe, the rest being dark matter and dark energy.
Each of the reasons is an independent point, so we have not organized this book by a succession of chapters or headings.
Which takes me back to our main point: “Why are you a Catholic?” is a good question.
A good question deserves a good answer.
Forty Reasons I Am a Catholic is a good starting point.