Correct -- you think, hope, wish; you don't know.
It would be the unmistakable "proof" and a dream-come-true for Christians to convert the rest of the world to Christ. In other words, God has to prove Himself worthy of our belief! Isn't it how human pride works? He is to satisfy our uncertainty before we can believe His sales pitch?
That's why Jesus reminded us that "blessed are those who believe but have not seen." But that's not how we want it, because satan has convinced us back in the Garden of Eden that we can be just like God, and since then we can't imagine anything more powerful than we are unless we see it.
We could equally well postulate that satan planted the Shroud and the Olviedo Cloth to tempt us, knowing how easy it would be to give in to it. People would worship the cloth! Talk about blasphemy!
The proof of God is not in the Shroud, but in His Creation. Just as you don't doubt that a house next to you was created by an architect and built by a builder, so it is obvious that all of Creation was designed by an Architect and built by a Builder.
We know God through His energies, His Wisdom, Word and Holy Spirit, and not through sorcery. Perhaps there is a reason why there is no original of any of the Scripture, and why there is no trace of any of the events described in the Bible. It is to separate those who believe and those who need proof.
We disagree about the utility of science in understanding faith.