The sacrifices described in Leviticus 1-7 are earthly pictures of the heavenly reality and specifically of the sacrifice of Jesus on the cross.  The sacrifices address sin but the peace offering specifically addresses restored felllowship with the Lord and with each other and provides for a meal to be shared.  Others speak of a pleasing aroma.  Are our lives a pleasing aroma to the Lord or do they stink.  Jesus death on the cross was the ultimate and perfect sacrifice for our sin to restore fellowship with God.