Man is the only one that knows nothing, that can learn nothing without being taught. He can neither speak nor walk nor eat, and in short he can do nothing at the prompting of nature only, but weep.

He that knew all that ever Learning writ, </br>Knew only this - that he knew nothing yet.

True knowledge exists in knowing that you know nothing.

One thing only I know, and that is that I know nothing'.

He knows nothing who does not draw profit from what he knows.

I am the wisest man alive, for I know one thing, and that is that I know nothing.

I am the wisest man alive, for I know one thing, and that is that I know nothing.

I know one thing: That I know nothing,

I only know one thing, and that is I know nothing

Who dares nothing, need hope for nothing.

He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors.

I know nothing except the fact of my ignorance.

I know nothing.

One thing only I know, and that is that I know nothing.