Psalm 40:6 Sacrifice and offering you did not desire – but my ears you have opened; – burnt offerings and sin offerings you did not require.
What surprised me when I first read it a long time ago was these words in the Old Testament. I had not thought of God’s requirements but rather what man had been doing for Him.
Because man had continued to sacrifice whether he had meant it or not the meaning had gone out of the sinless sacrifices being made all the time.
God has never required physical sacrifices but rather has asked for sacrifices from the heart that mean so much more. Jesus came as our sacrifice because of His great love for us. He wants us to show Him our love through our actions but from our hearts.