He should understand that reason, before making his own decision.

"Do you understand that we have to get her to the hospital?"

"Do I understand that she will now return to us in safety?"

He might not have understood that last one, but I do.

If you understand that idea, you're well into the spirit of Catch-22.

And for the first time, I understood that something else.

"People understand that the war's not going the way we wanted it to," he said.

I asked him in French, whether he understood that language.

Almost no one was ordinary, as we understand that word.

Only one person in the room understood that part of the song.