'Real sacrifice' is the theme for these week's reflections. Arthur by referring to Psalm 40: 6-8.
6 Sacrifice and offering you did not desire-- but my ears you have opened -- burnt offerings and sin offerings you did not require. 7 Then I said, "Here I am, I have come-- it is written about me in the scroll. 8 I desire to do your will, my God; your law is within my heart."