Psalm 40:6-8 Sacrifice and offering you did not desire— but my ears you have opened — burnt offerings and sin offerings you did not require.  Then I said, “Here I am, I have come— it is written about me in the scroll.  I desire to do your will, my God; your law is within my heart.”
I LOVE these verses. God never desired to collect offerings from His people. He wanted relationship! The offerings were a filler for the time until Jesus came to fulfill the ultimate plan of salvation. Are you still trying to “sacrifice” to God? Are you trying to earn His love through works? That is not what He wants. All He wants is a relationship with YOU! Then, He will change you from the inside out!