God is goodness itself. Because he acts completely in line with his good nature, God does good to all his creatures, but especially he does good to his people, even using suffering to bring about their good. God also must make us good. He does so by teaching us his word. And to do that, he must first open our eyes to the reality that on our own, we are not good.
We know this, almost instinctively: when marriages and families are healthy, society will generally be good. But where marriages are trashed, families are fragmented, and individuals become socially isolated, the Word of God remains true: “It is not good for man to be alone."