baron,
Perhaps, it's like the secret ingredient of Mr Ping's secret ingredient soup, the answer is "believe"..
It's just a pretty cross.....
Kung Fu Panda (2008)
Mr. Ping: We are noodle folk. Broth runs through our veins.
Mr. Ping: The secret ingredient is... nothing!
Po: Huh?
Mr. Ping: You heard me. Nothing! There is no secret ingredient.
Po: Wait, wait... it's just plain old noodle soup? You don't add some kind of special sauce or something?
Mr. Ping: Don't have to. To make something special you just have to believe it's special.
[Po looks at the scroll again, and sees his reflection in it]
Po: There is no secret ingredient.......
Regards,
MTF