“And there shall be no man in the tent of meeting when he goes in to make atonement in the holy place, until he come out, and have made atonement for himself, and for his household, and for all the assembly of Israel.”
And while all this was going on there was to be no one else in the tent of meeting. Throughout the whole process the High Priest was to act alone. Purified, atoned for, clothed in holy white garments, he alone was in a state to enter the tabernacle at this crucial time. Humanly speaking the task was his from start to finish. No other could take part. None could enter the sanctuary until atonement had been made for the Priest himself, for the other priests, for all his household, and for all the assembly of Israel.
This is a reminder to us that Christ's great work of atonement was also wrought by Him and by Him alone. No other was worthy to take part, nor could. The work was His and His alone. No priest, nor any other, could have any part in it. The work was total and complete.