The document discusses the importance of the sanctuary and its articles in the Old Testament tabernacle and their significance as types pointing to Jesus Christ and His ministry. It explains that the sanctuary and its articles like the altar, laver, table of showbread, and throne represent important spiritual truths about salvation through Jesus, including His atoning death, baptism and regeneration, communion, and heavenly ministry. The sanctuary service gives insight into God's plan of redemption and should be properly understood.