Guards! Guards! (Discworld, #8)

by Terry Pratchett

The Supreme Grand Master smiled in the depths of his robe. It was amazing, this mystic business. You tell them a lie, and then when you don’t need it anymore you tell them another lie and tell them they’re progressing along the road to wisdom. Then instead of laughing they follow you even more, hoping that at the heart of all the lies they’ll find the truth. And bit by bit they accept the unacceptable. Amazing.

Speaks of current times even though written some time ago. People never change.