Nothing is more dangerous than solitude.

There's nothing more dangerous than someone who wants to make the world a better place.

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

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

There’s nothing more dangerous than a good idea.

Fear of danger is ten thousand times more terrifying than danger itself.

Anywhere is dangerous if you carry danger with you.

The greatest danger is panic

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.

Nothing is more dangerous than an idea when it is the only one you have.

In modern Britain the most dangerous place to be is in your mother's womb. It should be a place of sanctity.

Of all the hazards, fear is the worst.

We are to regard existence as a raid or great adventure; it is to be judged, therefore, not by what calamities it encounters, but by what flag it follows and what high town it assaults. The most dangerous thing in the world is to be alive; one is always in danger of one's life. But anyone who shrinks from that is a traitor to the great scheme and experiment of being.

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