advocatus diaboli

Unus latro ingratus cum esset typus Diaboli, et Serpentis, et Jud, qui se in ligno suffocavit.

Still, I must confess that, in advancing these arguments, I feel somewhat like an advocatus diaboli.

Discussion of the eternal servant problem is apt to be one-sided; it was quite time that we heard from the advocatus diaboli.

The vox populi is often little more than the vox diaboli; but the voice of ages is the voice of God.