The Lord is my Shepherd. What does it mean?

"The normal way of looking at the cross is to say that =man was so bad and God was so mad that someone had to pay=. But it was not anger that led Christ to be crucified; it was love. The crucifixion is the point of the story. God loves us so much that He Himself took on our guilt. He internalized all our sin and healed it. When it was over He said, "It is finished!" There is nothing left for us to do but to enter into forgiving acceptance--and for those of us who have already entered it, to enter into more of it. "