Genesis 3: God put a mark on Cain to protect him.
The murderer has been confronted and has confessed. The sentence is banishment to a hostile world. From now on he’ll be an outsider, apart from the family (it’s not a nation yet) God claims as his own. Cain is crushed by this sentence and already feels the icy grip of loneliness on his life. Not only that, but he knows he’s getting off with a sentence lighter than he deserves. He senses that the proper penalty for murder is death. In addition, he realizes that other people know it too. God may be banishing him, but he imagines other men hunting him down and taking his life that justice might be done. What the Lord does in response is, at the same time, one of the great mysteries of the Bible and also one of many great acts of mercy. Cain’s marked in some way that says to all he encounters “This man is under God’s protection, leave him alone.” I have no idea of what that mark is, in fact, I can’t imagine how it works. However, I do know it’s a mark of mercy and I have a very good idea of what mercy looks like. It looks like the Lord forgiving me of my sins rather than condemning me as I deserve. It looks like hope instead of fear. It looks like Jesus on the cross of Calvary.
Take away: Thank God for the “mark of mercy!”