Closed-minded people don’t want their ideas challenged.

Yet like many other human traits that made sense in past ages but cause trouble in the modern age, the knowledge illusion has its downside. The world is becoming ever more complex, and people fail to realise just how ignorant they are of what’s going on. Consequently some who know next to nothing about meteorology or biology nevertheless propose policies regarding climate change and genetically modified crops, while others hold extremely strong views about what should be done in Iraq or Ukraine without being able to locate these countries on a map. People rarely appreciate their ignorance, because they lock themselves inside an echo chamber of like-minded friends and self-confirming newsfeeds, where their beliefs are constantly reinforced and seldom challenged.
Providing people with more and better information is unlikely to improve matters. Scientists hope to dispel wrong views by better science education, and pundits hope to sway public opinion on issues such as Obamacare or global warming by presenting the public with accurate facts and expert reports. Such hopes are grounded in a misunderstanding of how humans actually think. Most of our views are shaped by communal groupthink rather than individual rationality, and we hold on to these views out of group loyalty. Bombarding people with facts and exposing their individual ignorance is likely to backfire. Most people don’t like too many facts, and they certainly don’t like to feel stupid. Don’t be so sure that you can convince Tea Party supporters of the truth of global warming by presenting them with sheets of statistical data.

The people, unfortunately, are still very ignorant, and are kept in ignorance by the systematic efforts of all the governments, who consider this ignorance, not without good reason as one of the essential condition of their own power. Weighted down by their daily labor, deprived of leisure, of intellectual intercourse, of reading, in short of all the means and a good portion of the stimulants that develop thought in men, the people generally accept religious traditions without criticism and in a lump. These traditions surround them from infancy in all the situations of life, and artificially sustained in their minds by a multitude of official poisoners of all sorts, priests and laymen are transformed therein into a sort of mental and moral habit, too often more powerful even than their natural good sense.

For the most part people are not curious except about themselves.

Like many isolated people, they were wrapped up in themselves and not too interested in the world outside.

It is always assumed by the empty-headed, who chatter about themselves for want of something better, that people who do not discuss their affairs openly must have something to hide.

There are certain segments of society that will never lend an ear to a new idea. They squat in a certain place and will not budge from it. They will find many reasons to maintain a way of life that is comfortable to them. They’ll cling to old religions; they’ll fasten with the grip of death on ethics that were dead, without their knowing it, centuries before; they will embrace a logic that can be blown over with a breath, still claiming it is sacrosanct.

Most fools think they are only ignorant.

People get so caught up in the fact that they have limits that they rarely exert the effort required to get close to them.

The truth you believe in and cling to makes you unavailable to hear anything new.

They won't listen. Do you know why? Because they have certain fixed notions about the past. Any change would be blasphemy in their eyes, even if it were the truth. They don't want the truth; they want their traditions.

Nothing limits intelligence more than ignorance; nothing fosters ignorance more than one's own opinions; nothing strengthens opinions more than refusing to look at reality.

It is that same fear, the fear of ostracism that causes people to conform
and not question commonly accepted opinions or popular trends.

The meme for blind faith secures its own perpetuation by the simple unconscious expedient of discouraging rational inquiry.