We absolutely must leave room for doubt or there is no progress and there is no learning. There is no learning without having to pose a question. And a question requires doubt. People search for certainty. But there is no certainty. People are terrified — how can you live and not know? It is not odd at all. You only think you know, as a matter of fact. And most of your actions are based on incomplete knowledge and you really don't know what it is all about, or what the purpose of the world is, or know a great deal of other things. It is possible to live and not know.

Some people say, How can you live without knowing? I do not know what they mean. I always live without knowing. That is easy. How you get to know is what I want to know.

You see, one thing is, I can live with doubt and uncertainty and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong. I have approximate answers and possible beliefs and different degrees of certainty about different things, but I'm not absolutely sure of anything and there are many things I don't know anything about, such as whether it means anything to ask why we're here, and what the question might mean. I might think about it a little bit and if I can't figure it out, then I go on to something else, but I don't have to know an answer, I don't feel frightened by not knowing things, by being lost in a mysterious universe without having any purpose, which is the way it really is so far as I can tell. It doesn't frighten me.

To know and yet (think) we do not know is the highest (attainment); not to know (and yet think) we do know is a disease.

Human knowledge is by necessity incomplete. We cannot know in advance what we might be able to know and what might be essentially unknowable. But of one thing we can be sure: if we do not try to find things out, we shall never succeed.

He who thinks he knows, doesn’t know. He who knows that he doesn’t know, knows. For in this context, to know is not to know. And not to know is to know.

Life is about not knowing and then doing something anyway.

Sincerely believe that you might not know the best possible path and recognize that your ability to deal well with “not knowing” is more important than whatever it is you do know.

Life is not about what you know. It’s about what you don’t know. And we never know enough. That’s good news for the both of us. It means that until the day we die, we can keep learning.

We don’t know enough about ourselves. I think it’s better to know that you don’t know, that way you can grow with the mystery as the mystery grows in you. But, these days, of course, everybody knows everything, that’s why so many people are so lost.

You can only be afraid of what you think you know.

if you think you know what is going on, you haven’t got a clue about what’s going on.

Socrates: This man, on one hand, believes that he knows something, while not knowing [anything]. On the other hand, I – equally ignorant – do not believe [that I know anything].

True knowledge exists in knowing that you know nothing.