Yuval Noah Harrari, author of Sapiens, on not knowing things:
But I personally like the kind of science that broadens the horizons. I often tell my students at the University that my aim is that after three years, you basically know less than when you first got here. When you first got here, you thought you knew what the world is like and what is war and what is a state, and so forth. After three years, my hope is that you will understand that you actually know far, far less, and you come out with a much broader view of the present and of the future.