What does Hebrews 10:9 mean?
This verse is meant to draw a direct contrast between two things. In this case, they are the ideas mentioned in Psalm 40:6–8. That passage was quoted in Hebrews 10:5–7. The Psalmist referred to God's formation of the human body, specifically the ears, while pointing out that God was not ultimately interested in sacrifice. Instead, God's desire was for His will to be done, indicating that the use of that body was the real fulfillment of God's will.The point, so says the writer of Hebrews, is that God specifically intends to "set aside" sacrifice, instead highlighting the earthly performance of His will. That meshes with the other Old Testament quotations which have been given to prove that God has always intended for a new covenant to come. The old covenant's sacrifices, then, were only meant to be symbolic of the "real" resolution for our sin, which came through the incarnation and death of Jesus Christ.