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

There is but one evil, ignorance.

The true Wisdom is in recognizing our own ignorance.

One of my big things is that I wish to be a fisherman. I know it sounds silly ​and I'd sooner be rich than poor, and all the rest of that... but I wish the pain was ignorance or bliss or something.

Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.

It is always advisable to perceive clearly our ignorance.