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I have always been a learner because I knew nothing.

I'm sure that I don't know everything I want to know. I have so much more to learn.

I wish I knew what I know now before.

All thing I thought I knew; but now confess, the more I know I know, I know the less.

I learned nothing while I was in school.

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

To know what you know and what you do not know, that is true knowledge.

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.