Karl Popper Quotes

We think we know what's right. With excessive pride comes blindness.

There was nothing more dangerous than people convinced of their own good intentions.

It’s not bad people I fear so much as good people. When a person is sure that he is good, he is nearly hopeless; he gets cruel- he believes in punishment.

Nothing helps you sleep at night so much as being absolutely certain that you're right, and everyone else is evil.

There's one thing that always interests me about you good people, not your certainty that the rest of us are swine, - no doubt we are, - but your certainty that your opinions are pearls.

The idea that anyone would think their religious ideas make them morally superior is just preposterous.

Stupidity and unconscious bias often work more damage than venality.

A sense of righteousness is even more dangerous than a violent temper.

The greatest danger of bombs is in the explosion of stupidity that they provoke.

Half of the harm that is done in this world is due to people who want to feel important. They don't mean to do harm. But the harm does not interest them.

Stupidity always accompanies evil. Or evil, stupidity.

It's so easy to be wicked without knowing it, isn't it?

It's always the good men who do the most harm in the world.

Hardly any man is clever enough to know all the evil he does.

Stupidity without malice isn't horrible; some people can't help it.

When you think you're a really good person, you're actually capable of doing some real harm to people, either knowingly or unknowingly. It's the big little lie that we all live in.

A mark of stupidity is a belief that one party is totally virtuous and correct on the issues while the other is evil and always wrong.

Someone once said that people on the political left think that they would do what God would do if he were as well-informed as they are.

There's never been a true war that wasn't fought between two sets of people who were certain they were in the right. The really dangerous people believe they are doing whatever they are doing solely and only because it is without question the right thing to do. And that is what makes them dangerous.

Pierre was one of those people who are strong only when they feel themselves perfectly pure.

At the root of all the harm we cause is ignorance.

Misunderstandings and neglect occasion more mischief in the world than malice and wickedness.

There are people who are dangerous, and evil is real.

Stupid people are dangerous.

Loud indignation against vice often stands for virtue in the eyes of bigots.