Passing Tests
When Rome initially wanted to sift Christians out of any group, it was not done by making them recite creeds or answer catechism quizzes. It was by commanding them to worship the emperor.
That was a pretty genuine test. Unbelievers can memorize the answers. Suffering persecution for loving Jesus takes a real relationship with the King Who was raised from the dead, Who is hated by leaders who want to be worshiped.
Living in a way that proves Jesus is Lord is a much better evidence of the knowledge of Truth than just having all the right answers in a theology exam.
For this gospel I was appointed a herald, apostle, and teacher, and that is why I suffer these things. But I am not ashamed, because I know whom I have believed and am persuaded that He is able to guard what has been entrusted to me until that day.
(2 Timothy 1:11-12 HCSB ©®)