'Craftiness' in the Bible

said, "You who are full of every kind of craftiness and unscrupulous cunning--you son of the Devil and foe to all that is right--will you never cease to misrepresent the straight paths of the Lord?

But I am afraid that, as the serpent in his craftiness deceived Eve, so your minds may be led astray from their single-heartedness and their fidelity to Christ.