“I believe that ignorance is the root of all evil.
And that no one knows the truth.”
“(…) creation itself is rooted in ignorance; matter itself is ignorance. Not to know, and not to know that one does not know, is the cause of endless suffering.”
Suffering
Source: I am That, P.116.
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Nisargadatta Maharaj 138
Indian guru 1897–1981Related quotes
“Better to be ignorant of a matter than half know it.”
Maxim 865
Sentences, The Moral Sayings of Publius Syrus, a Roman Slave
“Ignorance perpetuates itself just as knowledge does.”
Arnole, in Ch. 45 : not in conclusion
The Visitor (2002)
Context: Ignorance perpetuates itself just as knowledge does. Men write false documents, they preach false doctrine, and those beliefs survive to inspire wickedness in later generations.... Conversely, some men write and teach about the truth, only to be declared heretic by the wicked. In such cases evil has the advantage, for it will do anything to suppress truth, but the good man limits what he will do to suppress falsehood.
One might almost make a rule of it: "Whoever declares another heretic is himself a devil. Whoever places a relic or artifact above justice, kindness, mercy, or truth is himself a devil and the thing elevated is a work of evil magic."

Source: Red Mars (1992), Chapter 5, “Falling into History” (p. 375)

“Real knowledge is to know the extent of one's ignorance.”

“The art of knowing is knowing what to ignore.”
https://twitter.com/wise_chimp/status/1488946174321205253?s=21

“The question is asked in ignorance, by one who does not even know what can have led him to ask it.”
Preface
1840s, Philosophical Fragments (1844)