Making the decision to withhold information from people to protect them.
Is there any greater act of deceptive wickedness than keeping people in the darkness and saying it's for their own good, plucking from the flock at whim, while you live where all is clear, all is visible?
The meta-lie here is that if you're strong enough it's worth it to live this way.
That's what power is, knowing the truth, while others do not, cannot know.