"When you have a hammer in your hand, everything looks like a nail; and when you have great power in your hand, everything looks like an invitation to meddle. Even if you somehow overcome this urge, the people surrounding you will never forget the giant hammer you are holding. Anybody who talks with you will have a conscious or unconscious agenda, and therefore you can never have full faith in what they say. No Sultan can ever trust his courtiers and underlings to tell him the truth."
21 Lessons for the 21st Century
"Just as the spectrum of light and sound are far broader than what we humans can see and hear, so the spectrum of mental states is far larger than what the average human perceives. We can see light in wavelengths of between 400 and 700 nanometres only. Above this small principality of human vision extend the unseen but vast realms of infrared, microwaves and radio waves, and below it lie the dark dominions of ultraviolet, X-rays and gamma rays. Similarly, the spectrum of possible mental states maybe infinite, but science has studied only two tiny sections of it: the sub-normative and the WEIRD."
Homo Deus, A Brief History of Tomorrow
"So why study history? Unlike physics or economics, history is not a means for making accurate predictions. We study history not to know the future but to widen our horizons, to understand that our present situation is neither natural nor inevitable, and that we consequently have many more possibilities before us than we imagine. For example, studying how Europeans came to dominate Africans enables us to realise that there is nothing natural or inevitable about the racial hierarchy, and that the world might well be arranged differently."
Sapiens, A Brief History of Humankind