Under the Levitical system, priests would offer the blood of animals (certainly not the priest’s own personal blood) to make atonement for the sins of the people (Ex. 29:36-37), but that blood could not “take away sins” (Heb. 10:4). But, when Christ came into the world, He did not come to offer someone else’s blood.
Note the emphasis in these four verses. “The church of God” was “purchased with His OWN BLOOD” (Acts 20:28). It was “Not with the blood of goats and calves, but with His OWN BLOOD” that He “obtained eternal redemption” (Heb. 9:12). In order to “sanctify the people,” Jesus “suffered” and gave “His OWN BLOOD” (Heb. 13:12). What a marvel it is to think how Christ “loved us and washed us from our sins in His OWN BLOOD” (Rev. 1:5).
These are the only four verses in the New Testament with the words “His own blood.” They emphasize that it is Christ’s own blood (and no other blood) that was given to wash us, purchase us, redeem us and sanctify us! He paid the ultimate price! What kind of sacrifice have I made for Him?