Leviticus 16:33,34

A summary of what was done on the day of atonement.

The day was intended as an occasion for expressing more completely than could be done in the ordinary sacrifices the spiritual truth of atonement, with a fuller acknowledgment of the sinfulness and weakness of man and of the corruptible nature of all earthly things, even of those most solemnly consecrated and devoted to the service of God. It belonged to its observances especially to set forth, by the entrance of the high priest into the holy of holies, that atonement could only he effected before the throne of Yahweh Himself (compare Matthew 9:6; Mark 2:7; Hebrews 4:16, etc.); and, by the goat sent into the wilderness, that the sins atoned for were not only forgiven, but carried wholly away. See Leviticus 16:22 note. The rites were a solemn gathering up of all other rites of atonement, so as to make them point more expressively to the revelation to come of God’s gracious purpose to man in sending His Son to be delivered for our offences, and to rise again for our justification; to be our great high priest forever after the order of Melchisedec, and to enter for us within the veil Romans 4:25; Hebrews 6:20. The Day of Atonement expanded the meaning of every sin-offering, in the same way as the services for Good Friday and Ash Wednesday expand the meaning of our litany days throughout the year, and Easter Day, that of our Sundays.