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Being at ease with not knowing is crucial for answers to come to you.

You can't know what you don't know. You can't know about things you have yet to discover.

When you don't know that you don't know, it's a lot different than when you do know that you don't know.

To know, is to know that you know nothing. That is the meaning of true knowledge.

A lot of people you think you know you don't know until you find out you don't know then it may be too late to know.

It wasn't until late in life that I discovered how easy it is to say, 'I don't know.'

When you know a thing, to hold that you know it, and when you do not know a thing, to allow that you do not know it - this is knowledge.

It is impossible to begin to learn that which one thinks one already knows.

It is better, of course, to know useless things than to know nothing.

It is better to know nothing than to know what ain't so.