The wise man is one who knows what he does not know

- Lao Tsu

In the beginner's mind there are many possibilities, but in the expert's there are few

- Shunryu Suzuki, Zen master

Real knowledge is to know the extent of one's ignorance

- Confucius

The more I know, the more I understand one thing: that I know nothing

- Osho

Nobody knows anything

- William Goldman, Hollywood producer