Just because people are corporeal born to this world doesn't mean that they understand everything about it, similarly just because somebody's died doesn't mean that they understand everything about the incorporeal world.
I'll do it by all means.
I didn't mean that.
I don't mean you.
What do you mean by that?
Do it by all means.
Tell me what you mean.
I mean it!
What do you mean?
What does he mean to do?
He is above all meanness.
Just as one gesture can have many different meanings, many different gestures can have the same meaning.