Anne Rice said this quote

My Lasher is powerful beyond yourdreams of a daimon, and he has learnt much.’‘Learned,’ I repeated in amazement. ‘How learned, Deborah, for he is merely a spirit, and they areforever foolish and therein lies the danger, that in granting our wishes they do not understand thecomplexity of them, and thereby prove our undoing. There are a thousand tales that prove it. Has this nothappened? How so do you say learned?