God preserved it. He could have used rocks if needed. No credit would go to the rocks either.
That was a really obvious obfuscation. Deflecting the attention from a statement from scripture however was not overlooked.
God preserved it through the efforts of the Catholic Church...granted that it was His will, but also His way...if He had decided to use rocks, the rocks would recieve no credit, but the sculptors would....bare rocks tell nothing, bare papyrus tells nothing. It takes a person, writing on them, to bring out the message......other that the ten commandments of course.