It really is very dangerous to believe people. I never have for years.

The only thing more dangerous than an idea is a belief. And by dangerous I don't mean thought-provoking. I mean: might get people killed.

The only thing more dangerous than an idea is a belief.

My theory is that we are all idiots. The people who don’t think they’re idiots — they’re the ones that are dangerous.

There is no person who is not dangerous for some one.

It's very dangerous to believe people, I haven't for years.

You think we are in danger there?"
"Danger? It depends what you regard as dangerous. Some wisdom may be dangerous to one man and not to another.

It is dangerous to know, but it is more dangerous not to know.

Beware of false knowledge; it is more dangerous than ignorance.

To believe all men honest is folly. To believe none is something worse.

To believe all men honest would be folly. To believe none so, is something worse.

There is no man more dangerous than one who does not doubt his own rightness.

Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.

No one is more dangerous than someone who thinks he has "The Truth". To be an atheist is almost as arrogant as to be a fundamentalist. But then again, I can get pretty arrogant.