“Art hath an enemy call'd ignorance.”
Every Man out of His Humour (1598), Act I, scene 1
Help us to complete the source, original and additional information
Ben Jonson 93
English writer 1572–1637Related quotes

1960s, The American Promise (1965)
Context: For Negroes are not the only victims. How many white children have gone uneducated, how many white families have lived in stark poverty, how many white lives have been scarred by fear, because we have wasted our energy and our substance to maintain the barriers of hatred and terror? So I say to all of you here, and to all in the Nation tonight, that those who appeal to you to hold on to the past do so at the cost of denying you your future. This great, rich, restless country can offer opportunity and education and hope to all: black and white, North and South, sharecropper and city dweller. These are the enemies: poverty, ignorance, disease. They are the enemies and not our fellow man, not our neighbor. And these enemies too, poverty, disease and ignorance, we shall over, come.

“Our true enemies are: ignorance and limitation.”
The Impact of Space Activities Upon Society (ESA Br) European Space Agency (2005)

“Consistency is the enemy of enterprise, just as symmetry is the enemy of art.”
As quoted in Bernard Shaw : The Lure of Fantasy (1991) by Michael Holroyd
1940s and later

“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

“Time which antiquates Antiquities, and hath an art to make dust of all things.”
Source: Hydriotaphia, Urn Burial (1658), Chapter V

Introductio ad prudentiam: Part II (1727)