Glendower

I can call spirits from the vasty deep.

Hotspur

Why, so can I, or so can any man;

But will they come when you do call for them?

Glendower

Why, I can teach you, cousin, to command

The devil.

Hotspur

And I can teach thee, coz, to shame the devil

By telling the truth; tell truth and shame the devil.

If thou have power to raise him, bring him hither,

And I’ll be sworn I have power to shame him hence.

O, while you live, tell truth and shame the devil!

Shakespeare

Henry IV, Part I