Who Is God? What's He Like?

Who is God? What is he like? What can we expect of him?

God is jealous.
The LORD revenges, and is furious.
The LORD will take vengeance on his adversaries.
He reserves wrath for his enemies.
The LORD is slow to anger.
He is great in power.
He will not at all acquit the wicked.
The LORD has his way in the whirlwind and in the storm.
The clouds are the dust of his feet.
The mountains quake at him.
The LORD is good.

Nahum 1:2-7