We still need to come before our heavenly Father and confess our sins. Jesus has become the 'substitute spotless Lamb' for us. It's His blood that was shed so we could be forgiven. We don't bring a Lamb or a pigeon or anything like that, but the Father in Heaven has provided the lamb for us, Jesus His Son. Who fully man and divine is the ONLY sacrifice that would be sufficient for me. Blood still needs to flow so we can be reconciled to God, but it's the blood of His Son, the Saviour of the world.