12 And the Lord said unto Moses, Come up to me into the mount, and be there: and I will give thee tables of stone, and a law, and commandments which I have written; that thou mayest teach them.
Moses is called up into the mountain again, this time for the Lord to write His laws and commandments upon tables of stone and give them to Moses. Of course, the Lord already had given His laws, at least His preliminary ones, and Moses had written them in a book, but it would seem that the Lord wanted to establish His word with something more permanent.
There is obviously symbolic significance in etching the law of God into the stone. As already mentioned, there is the permanence aspect of it. Words on a page could be torn, blotted out, smeared, stained, burned, and washed away. Ink creates its forms for a time, but negligence, misfortune, and malice can all destroy those forms. A table of stone, however, would be immune to all of the methods of defacing mentioned above. So, too, God’s law was not meant to be smeared or crumpled by the philosophies of man, but to withstand all such attacks.
Though it should be noted, tables of stone are not indestructible either. Though they may withstand much more abuse, they can still be broken, ground into dust, and eroded. God’s law is absolute and eternal, but any form of it here on Earth is subject to degradation. Every earthly attempt at permanence is ultimately in vain and ultimately mankind will always depend on the Lord to refresh His words and His law after we have all gone astray.
Though, there is a counterpoint to this that is also symbolized in the Lord carving His law into the rock. This is the Lord putting His words into nature itself, carving His principles into the very face of the mountain. This suggests to us that even if our structures and edifices to God may deteriorate and grow dim, there are infinite other chapels to Him on Earth that will never cease. His law is written right into the layers of our rock, the fibers of our trees, and the lettering of our DNA. All the Earth is secretly imprinted with Him and His word, and those truths can be drawn out by the truly observant in every age.