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 most dangerous things are heroin and a monthly salary

Love is the most dangerous thing in the world.

One of the most dangerous things in the universe is an ignorant people with real grievances. That is nowhere near as dangerous, however, as an informed and intelligent society with grievances.

"The most dangerous things are heroin, and a monthly salary." Right, because they are highly addictive.

The most dangerous person in the world is the one who shows up every single day even when the rewards are uncertain. The one who can tolerate the most uncertainty is the one who will eventually win.

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.

"Dangerous" does not mean exciting or bold; it means likely to cause great harm. The most dangerous idea is the only dangerous idea: The idea that ideas can be dangerous.

There are certain truths that, in themselves, are as dangerous as any advanced technology.

The most dangerous people in the world are not the tiny minority instigating evil acts, but those who do the acts for them – for a paycheck. To act without a conscience, but for a paycheck, makes anyone a dangerous animal. The devil would be powerless if he couldn’t entice people to do his work. So as long as money continues to seduce the hungry, the hopeless, the broken, the greedy, and the needy, there will always be war between people.

Sometimes the most dangerous weapon isn't the machine—it's the mind that programs it.

The most dangerous thing you can do is to take any one impulse of your own nature and set it up as the thing you ought to follow at all costs. There is not one of them which will not make us into devils if we set it up as an absolute guide. You might think love of humanity in general was safe, but it is not. If you leave out justice you will find yourself breaking agreements and faking evidence in trials "for the sake of humanity", and become in the end a cruel and treacherous man.

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

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