In our infinite ignorance we are all equal. Conjectures and Refutations: The Growth of Scientific Knowledge (1963)
The more we learn about the world, and the deeper our learning, the more conscious, specific, and articulate will be our knowledge of what we do not know, our knowledge of our ignorance. Conjectures and Refutations: The Growth of Scientific Knowledge (1963)
Ignorance is not a simple lack of knowledge but an active aversion to knowledge, the refusal to know, issuing from cowardice, pride or laziness of mind. Misattributed