Although I don't have a twin, I use to doubt many so-called doctrines in the Bible until I said, in a ways, Lord, I won't believe 'em until You prove 'em to me. Well, in a ways, He said no, because they're not my truths. After spending some years researching all of them I finally found what was true. And I rejoiced, "My Lord and My God."
The Bible shows use the most profound apostles were the ones who doubt the Word, then repented to spread it...Peter, Paul, Thomas, & James.