God knows how to use even evil  

Gen 44:18-21, 23-29; 45:1-5

‘At this, Judah went up to him and said, ‘May it please my lord, let your servant have a word privately with my lord. Do not be angry with your servant, for you are like Pharaoh himself. My lord questioned his servants, “Have you father or brother? „And we said to my lord, “We have an old father, and a younger brother born of his old age. His brother is dead, so he is the only one by that mother now left, and his father loves him. “Then you said to your servants, “Bring him down to me, so that I can set eyes on him. But you said to your servants, “If your youngest brother does not come down with you, you will not be admitted to my presence again.” When we went back to your servant my father, we repeated to him what my lord had said. So when our father said, “Go back and get us a little food,” we said, “We cannot go down. We shall go only if our youngest brother is with us for, unless our youngest brother is with us, we shall not be admitted to the man’s presence.

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