Why do you just keep looking at each other?

Genesis 42:1-38
Why do you just keep looking at each other?
Ten of Joseph's brothers went down to buy grain from Egypt. But Jacob did not send Benjamin, Joseph's brother, with the others, because he was afraid that harm might come to him.
They said to one another, "Surely we are being punished because of out brother. We saw how distressed he was when he pleaded with us for his life, but we would not listen; that's why this distress has come upon us."
Why?
These chapters give a moving account of Joseph's meeting, testing and eventual reunion with his brothers. Behind his apparent harshness lies complete and generous forgiveness of the wrong done him, and a real understanding of the way God controls human destiny.
Under each new stress the brothers show a genuine change of attitude from the old days. Twenty years have not obliterated(抹殺) their sense of guilt.
Judah succeeds where Ruben had failed. He now takes the lead.
Why do you keep looking at each other? Do something, something we heard, do something? This is the right action to me!
How?
Do something when I heard or saw something, do not just keep looking!