The word atonement carries with it the idea of the just, holy, righteous side of God’s nature being satisfied. God’s law required death as the penalty for sin. When God saw the death of the innocent sacrifice, he was satisfied that the demands of his law had been carried out. Sacrificing an animal on an altar did not take away the sin. Man was still sinful. The sacrifice only pictured what was necessary for sin to be forgiven—death and shedding of blood. The blood provided an atonement or covering for sin.” –The Stranger on the Road to Emmaus by John R. Cross
Out of the tabernacle’s six pieces of furniture, so far we’ve looked at the ark of the covenant, the table of “presence bread”, the golden lampstand, and the incense altar. We now come to the fifth piece of furniture where animal sacrifices were burned: the brazen altar.
One Way to God
There was only one way to get to the altar of God because there was only one entrance gate to this enclosure. Likewise, there is only one entrance to God. The “gate” is Jesus Christ (John 14:6; 10:9). Many think that every way is acceptable to God in our pluralistic society, but Scripture teaches otherwise (Prov. 14:12; Matt. 7:13-27). Forgiveness from sin and fellowship with God can only be attained through His Son.
Below is a summary of the significance and symbolism of the brazen altar.
For more on the significance of the tabernacle sacrifices and how they point to Jesus Christ, I found the following post from the Tabernacle Place helpful: The Brazen Altar. Also, The Bronze Altar from Bible History Online offers a more detailed post. Blessings!