The ultimate power is the power to get people to do as you wish.
When you can do this without having to force people or hurt them, when they willingly grant you what you desire, then your power is untouchable.
The courtier must execute these gestures with what he calls sprezzatura, the capacity to make the difficult seem easy.
Practice in all things a certain nonchalance which conceals all artistry and makes whatever one says or does seem uncontrived and effortless.