Carl Sagan Quotes

We should not be upset that others hide the truth from us, when we hide it so often from ourselves

To be stupid, and selfish, and to have good health are the three requirements for happiness.

Humans are stupid. I'm ashamed to be human.

The problem with educating stupid people was that they didn’t know they were stupid. The same went for curing crazy people.

Question is, are you bozos smart enough to feel stupid?

Not biology, but ignorance of ourselves, has been the key to our powerlessness

...but then the general trouble with ignorance is always that the ignorant person has no idea that that's what they are. You can be ignorant and stupid and go through your whole life without ever encountering any evidence against the hypothesis that you're a genius.

Being both stupid and ignorant is an accomplishment.

I can always tell how stupid someone is by how certain they are about what they're saying.

You can be sincere and still be stupid.

I may be daft but I'm no' stupid!

It never ceases to amaze me that in times of amazing human suffering somebody says something that can be so utterly stupid

Posterity! Why should people be less stupid tomorrow than they are today?

He who cries, 'What do I care about universality? I only know what is in me,' does not know even that.

A barbarian is not aware that he is a barbarian.

How could I have been so stupid to ignore everything I’d had in my life? The color red alone was worth kingdoms.

Nonsense! The most hopelessly stupid man is he who is not aware that he is wise.

When you are dead, you do not know you are dead. It's only painful and difficult for others. The same applies when you are stupid.

The world is run by one million evil men, ten million stupid men, and a hundred million cowards.

You see I kept asking myself then: why am I so stupid that if others are stupid—and I know they are—yet I won't be wiser?

Men are so stupid and concerned with their present needs, they will always let themselves be deceived.

You want to be as smart as you can about being stupid.

Maybe we were all destined to just keep doing the same stupid things, over and over again, never really learning a single thing.

When ignorance does not know something, it says that what it does not know is stupid.

Sometimes a man wants to be stupid if it lets him do a thing his cleverness forbids.