The Passover sacrifice is basically unconnected with atonement, but represents the peace and security which attends fellowship with God because of His acceptance.
There must be something to prove we are one with Christ and in union with the Father and the Son. That something is the manner in which we conduct our life.
In the peace offering, Christ is the priest, offeror, and offering. Since all parties share the peace offering as a meal, it exemplifies a peaceful communion.
[Editors Note: Audio quality improves at the 4 minute mark.]
We may do the right thing toward a neighbor but not do it with the exact, perfect attitude that God does it in. Thus, our 'good' work contains corruption.
Right now in the church of God, doctrinal differences divide us, including when to start the count to Pentecost when Passover falls on a weekly Sabbath.
The leavening indicates that the wave loaves speak to this life rather than the resurrection. It is accepted by God only because of the other sacrifices.
The Feast is not a celebration just for the sake of having a good time. Our festivities should focus on God's faithfulness, rejoicing in all He did during the year.
The meal offering represents the intense self-sacrifice required in service to man. Our service to man must be done for God's sake rather than man's appreciation.
The Day of Atonement is not about Satan, but about the complete cleansing from sins through Christ. The Passover is not a sin offering, but a peace offering.
Pentecost forces us to stand out from the crowd, separated as firstfruits for sanctification and holiness. God has called us to be different.
God instructed the Israelites to divide themselves by tribes on Mount Gerizim and Mount Ebal to pronounce blessings and curses, providing lessons for us.