On the typical day of atonement when the high priest of Israel slew the animals, the Lord's goat pictured this class who come to the Lord in consecration.

That goat must be perfect, without any blemish; thus foreshadowing how that all who are presented unto the Lord to be accepted as a part of the sacrifice of Jesus, and hence to become members of his body, must be perfect; and since man is imperfect himself something must be done for him in order to make him stand before the Lord Jehovah as perfect.

He must be justified.

Justification means to be made right with God.

This must all be done in the acceptable time of the Lord.