Opinion is the medium between knowledge and ignorance.
Ignorance, the root and stem of all evil.
There is only one good, knowledge, and one evil, ignorance.
Facts do not cease to exist because they are ignored.
I count religion but a childish toy, and hold there is no sin but ignorance.
He knows nothing; and he thinks he knows everything. That points clearly to a political career.
Our comforting conviction that the world makes sense rests on a secure foundation: our almost unlimited ability to ignore our ignorance.
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
