The Lord has been reacting to what man is doing under the heaven. Man is trying to establish a personal Sabbath Garden like Eden where God is going to be lead around like a little dog catering to the wishes of man. Is the Lord going to allow something like this to happen again and again? What about the promise of the Lord raising up a faithful line to love Him, honor Him, and serve Him? Moses introduces to us a new character that the Lord has chosen to use in the building of His kingdom.