1)
What is the significance of what he did at his party?
1.
Malbim: You exalted yourself over your Master, as if you defeated Him, and profane the Kelim of His Bayis. Further, you praised gods of silver and gold, and not Elokim, that your Neshamah is in His hand.
2)
What do we learn from "v'Chol Orchasach Le"?
1.
Ibn Ezra (20): You are in His hand. He moves you where He wants, like a horse's reins in the rider's hand.
2.
Ibn Ezra (20, citing Yefes): In your end, you will go to Him - "veha'Ru'ach Tashuv El ha'Elokim Asher Nesanah."
3.
Malbim: All your ways are attributed to Him.
