On what did God write the Ten Commandments?

Answer

"And He declared unto you His covenant, which He commanded you to perform, even Ten
Commandments; and He wrote them upon two tables of stone." Deut. 4: 13.

How was Christ's first advent to be heralded?
How did God prove Israel in the wilderness?
When did the stars fall, as here predicted?
Why will many not be prepared for this event?
What is to be their fate?
How perfect would God have us become?
How did Elijah pray before obtaining his request?

Questions & Answers are from the book Bible Readings for the Home Circle