You can't compare Satan and the demons' belief to ours. They were created already saved but they rebelled and lost it. We are born lost and need salvation. It's completely opposite. The demons knew from their beginning exactly who Jesus is but Satan led them astray. Now they tremble because they know what they've thrown away and what's coming in the end.
“In a time of deceit telling the truth is a revolutionary act.” ― George Orwell
It's not over when you lose. It's over when you quit.
