In Old Testament days, the priest offered animal sacrifices on the altar at the tabernacle, and later at the temple. They all pointed to the one who would offer a sacrifice for sins forever. There is no longer a tabernacle, nor a temple.
The only sacrifice for sin available today is at the cross of Jesus. What He did for sinners at the cross is for all who believe, and it's forever. All have sinned against God's commands, and all need a sacrifice for their sins.
Is Christ your sacrifice for sin? He certainly is, if you believe that He died for your sins and was raised from the dead. The resurrection of Jesus Christ is evidence that God the Father accepted his sacrifice for all of our sins. That's good news. Jesus offered one sacrifice for sins forever.
"But if we walk in the light
as He is in the light,
we have fellowship one with another,
and the blood of Jesus Christ His Son
cleanses us from all sin."
1 John 1:7
