True evil is, above all things, seductive. When the Devil knocks at your door, he doesn't have cloven hooves. He is beautiful and offers you your heart's desire in whispered airs. Like a siren, beckoning you to her ruinous shore.
And what do you? When that siren sings?
You save your soul or you give it to her.
But then you're damned. But you're not alone.