The LORD reigns, He is clothed with majesty;
The LORD is clothed,
He has girded Himself with strength.
Surely the world is established, so that it cannot be moved.
Your throne is established from of old;
You are from everlasting. Psalm 93.1, 2
I can think of few Biblical teachings on which it is more important for Christians to be clear than the teaching concerning the Kingdom of God.