How does God love?

Luther:

Human love is love for something which is worthy of love. When you see something beautiful and lovely, you are going to love it. But with God’s love it is the opposite. That love does not arise because something is worth His love, but that makes something worthy of love. God loves sinners; bad, foolish and weak people in order to make them righteous, good, wise and strong. Sinners are beautiful and lovely, because God loves them, but he does not love them because they are beautiful and lovely. I call this the love of the cross.