But courage which goes against military expediency is stupidity, or, if it is insisted upon by a commander, irresponsibility.

When stupidity is considered patriotism, it is unsafe to be intelligent.

Being stupid means avoiding thinking by jumping to conclusions.

Faced with what is right, to leave it undone shows a lack of courage.

stupidity can be as bad as malice

There is nothing more horrifying than stupidity in action.

To see what is right and not do it is the worst cowardice.

Stupidity is far more dangerous than evil, for evil takes a break from time to time, stupidity does not.

The more stupid one is, the closer one is to reality. The more stupid one is, the clearer one is. Stupidity is brief and artless, while intelligence squirms and hides itself. Intelligence is unprincipled, but stupidity is honest and straightforward.

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

There's no defense against stupidity.

There are so many different kinds of stupidity, and cleverness is one of the worst.

Fear is stupid, so are regrets.

There is nothing worse than aggressive stupidity.