1 Samuel 28:11

Whom shall I bring up - The woman certainly meant no more than making her familiar personify whomsoever the querist should wish. In the evocation of spirits this is all that, according to the professed rules of their art, such persons pretend to; for over human souls in paradise or in the infernal regions they have no power. If we allow that there is such an art founded on true principles, all it can pretend to is, to bring up the familiar; cause him when necessary to assume the form and character of some particular person, and to give such notices relative to futurity as he is able to collect. And this even in the cases to which authenticity is generally allowed, is often scanty, vague, and uncertain, for fallen spirits do not abound in knowledge: this is an attribute of God, and rays of this perfection are imparted to pure and holy intelligences; and even Satan himself, as may be seen from most of his temptations, is far from excelling in knowledge. He may be cunning and insidious, but he certainly is not wise and prudent; we in general give this fallen spirit credit for much more wisdom than he possesses.