Knowledge of what is does not open the door directly to what should be.

There comes a time when the mind takes a higher plane of knowledge but can never prove how it got there.

Imagination is more important than knowledge.

Ignorance is the curse of God; knowledge is the wing wherewith we fly to heaven.

One whose knowledge is confined to books and whose wealth is in the possession of others, can use neither his knowledge nor wealth when the need for them arises.

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