He’s the loser and he knows it.
Revelation 12:12
“Therefore rejoice, O heavens, and you who dwell in them! Woe to the inhabitants of the earth and the sea! For the devil has come down to you, having great wrath, because he knows that he has a short time.”
He knows He is condemned, but he still believes he will make himself as the most High. He isn’t stupid. He’s very intelligent, but very arrogant, and righteously condemned.