Terry Pratchett, Neil Gaiman. Good signs (№ 373315)

You see, evil always contains seeds of his defeat, ' said the angel. - Nature - denial, and therefore includes the destruction, even in moments of apparent victory. And no matter how his plan is ambitious, well-planned, protected from errors by definition are evil sinful fall to the attackers. And no matter how much they succeed in their deeds, because in the end they call death on their heads. And their imaginations broken on the rocks of unrighteousness, and they will be brought down into the abyss of oblivion, and disappear without a trace.
Crowley thought.
"No," he said at last. - I bet someone just made a mistake.