“ I am the wisest man alive, for I know one thing, and that is that I know nothing. ”
Source: The Republic
Similar Quotes
The public have an insatiable curiosity to know everything, except what is worth knowing. 
The more I read, the more I acquire, the more certain I am that I know nothing. 
We can know only that we know nothing. And that is the highest degree of human wisdom. 
"What makes us the most normal," said Reiko, "is knowing that we're not normal." 