Martin Luther, believed in demons but he believed in God more. In that great Hymn "A Mighty Fortress Is Our God" he writes:

And though this world, with devils filled,
should threaten to undo us,
We will not fear, for God hath willed
His truth to triumph through us:

The Prince of Darkness grim,
we tremble not for him;
His rage we can endure, for lo, his doom is sure,
One little word shall fell him.

That hymn, first published in 1529, has been called "the greatest hymn of the greate…