The greatest obstacle to ...

The greatest obstacle to knowledge is not ignorance, it is the illusion of knowledge.
The greatest obstacle to knowledge is not ignorance, it is the illusion of knowledge.
 Daniel J. Boorstin

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.

Quotes from the same author

The greatest obstacle to discovery is not ignorance - it is the illusion of knowledge.
 Daniel J. Boorstin
History had been man's effort to accomodate himself to what he could not do. Amereican history in the 20th century would, more than ever before, test man's ability to accomodate himself to all the new things he could do.
 Daniel J. Boorstin
The force of the advertising word and image dwarfs the power of other literature in the 20th century.
 Daniel J. Boorstin
We must abandon the prevalent belief in the superior wisdom of the ignorant.
 Daniel J. Boorstin
As individuals and as a nation, we now suffer from social narcissism. The beloved Echo of our ancestors, the virgin America, has been abandoned. We have fallen in love with our own image, with images of our making, which turn out to be images of ourselves.
 Daniel J. Boorstin