Speak of the devil, and he shall appear.
The devil can cite Scripture for his purpose.
The devil has his elect.
When you dance with the devil, the devil doesn't change. The devil changes you.
The devil is smooth as silk and twice as slippery.

The devil's in the house of the rising sun.
The greatest minds are capable of the greatest vices as well as of the greatest virtues.
Man can hardly even recognize the devils of his own creation.
If the devil doesn't exist, but man has created him, he has created him in his own image and likeness.
I do not love the bright sword for its sharpness, nor the arrow for its swiftness, nor the warrior for his glory. I love only that which they defend.
The devil is in the details.

The greatest trick the Devil ever pulled was convincing the world he didn't exist.
Better to reign in Hell than serve in Heaven.
The devil is a better theologian than any of us and is a devil still.

Fear the devil, but fight him with the cross.

A devil is still a god's creature.

The devil's voice is sweet to hear.
The devil doesn't come dressed in a red cape and pointy horns. He comes as everything you've ever wished for.
The devil is an optimist if he thinks he can make people worse than they are.
Give the devil his due.