“He [Christ Jesus] humbled Himself and became obedient to death—even death on a cross! Therefore God exalted Him to the highest place and gave Him the name that is above every name, that AT THE NAME OF JESUS EVERY KNEE SHOULD BOW, IN HEAVEN AND ON EARTH and under the earth, and every tongue confess that Jesus Christ is Lord, to the glory of God the Father.”
Philippians 2:8-11.

Ever since sin began, the devil has been slandering God’s character, accusing Him of being unfair. But now all the questions are answered, all the perplexities resolved. At the end, not even Satan himself, the great accuser, will have a word to say in his own defense. Now every being in the universe acknowledges that, even in judgment, especially in judgment, Jesus, the Lamb of God, is worthy of our love and worship. A great chorus declares: “Worthy is the Lamb, who was slain” (Revelation 5:12).

The whole plan and purpose of God is now fully revealed, and God’s character stands vindicated.

All nations will come and worship before you, for your righteous acts have been revealed.
Revelation 15:4.

“Then I heard every creature in heaven and on earth and under the earth and on the sea, and all that is in them, singing: ‘To Him who sits on the throne and to the Lamb be praise and honor and glory and power for ever and ever!’”
Revelation 5:13.

Not only the saved, but also evil angels and Satan himself will confess that Satan’s way has been wrong and that God’s ways are just and true. All see that evil and selfishness has led only to unhappiness and discontent—that such a life is not worth continuing.