“Not ignorance, but ignorance of ignorance is the death of knowledge.”
Help us to complete the source, original and additional information
Alfred North Whitehead 112
English mathematician and philosopher 1861–1947Related quotes

“Knowledge is freedom and ignorance is slavery”
Source: Miles: The Autobiography

“The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.”

“The greatest enemy of knowledge is not ignorance. It is the illusion of knowledge.”
Sometimes attributed to Hawking without a source, but originally from historian Daniel J. Boorstin. It appears in different forms in The Discoverers (1983), Cleopatra's Nose (1995), and introduction to The Decline and Fall of the Roman Empire (1995)
Misattributed

Source: In Praise of Philosophy (1963), p. 5
Context: Even those who have desired to work out a completely positive philosophy have been philosophers only to the extent that, at the same time, they have refused the right to install themselves in absolute knowledge. They taught not this knowledge, but its becoming in us, not the absolute but, at most, our absolute relation to it, as Kierkegaard said. What makes a philosopher is the movement which leads back without ceasing from knowledge to ignorance, from ignorance to knowledge, and a kind of rest in this movement.

“Where knowledge is a duty, ignorance is a crime.”
"Public Good" (December 1780) http://www.thomas-paine-friends.org/paine-thomas_public-good-1780.html.
1780s
“If knowledge is power, ignorance cannot be bliss.”
As quoted in Lies My Teacher Told Me: Everything Your American History Textbook Got Wrong https://books.google.com/books?id=5m2_xeJ4VdwC&dq=%22although+he+may+be+poor+not+a+man%22&source=gbs_navlinks_s (2007), New York: New Press, p. 342
2000s, 2007, Lies My Teacher Told Me: Everything Your American History Textbook Got Wrong (2007)

“Knowledge leads to unity, and Ignorance to diversity.”
Saying 368
Râmakrishna : His Life and Sayings (1898)

“Duality is ignorance, non-duality is knowledge.”
Living Hinduism ( Page 87 )