Do Cain’s remarks at Gen 4:13-14 show he was contrite after his sentencing?

The fact that two verses are given to Cain’s description of his punishment might be thought to show this, but it is not altogether clear, because he never actually expresses regret or asks for forgiveness. He does show that he recognizes the severity of the curse and punishment, and he shows well-justified fear. It is well that he might react this way, considering that this is the harshest punishment meted our to humanity yet, being left to literally wander the wilderness without any help from man or God. But it is perhaps God’s mercy on him—bestowing the mark that forbids vengeance, at Gen 4:15—that is best evidence that Cain was contrite and perhaps not wholly lost.