Since we will at that time stand before our Creator, King and Judge of all life, we too should prepare for battle. Battle to improve our ways, to show fruits meet for repentance.
According to the stipulation of the Holy days, this represents a time when God has emerged from His distant and all but inaccessible palace. He will have returned, and renewed, His presence on the earth. It was of course the most High, who withdrew to the 3rd heaven because of the sins of the people. Shortly after the 10 commandments were given the Lord had to lead the people by the hand of an angel because of their harden hearts:
Just as the Most High brought us to freedom from bondage in Egypt, He will aid us as we individually free ourselves of our own self-imposed shackles, if we lean not to our own understanding.