There is no learning without remembering.

The only good is knowledge and the only evil is ignorance.

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

All that I know is nothing - I'm not even sure of that.

You don't know what you don't know.

Our treasure lies in the beehive of our knowledge. We are perpetually on the way thither, being by nature winged insects and honey gatherers of the mind.