The Church was purchased with God's own blood.

"Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood." - Acts 20:28 KJV

How could the Spirit of God have blood?

God robed Himself in flesh so He could make the ultimate atonement for our souls. (1Timothy 3:16, 2Corinthians 5:19).

"The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world." - John 1:29 KJV

Blood was necessary to free the offender from charge. (Atonement)

"For the life of the flesh is in the blood: and I have given it to you upon the altar to make an atonement for your souls: for it is the blood that maketh an atonement for the soul." - Leviticus 17:11 KJV

"And almost all things are by the law purged with blood; and without shedding of blood is no remission." - Hebrews 9:22 KJV

Remission of sins is forgiveness, pardon, of sins (the letting them go, as if they had not been committed) remission of their penalty – Thayer’s Greek Lexicon

"For this is my blood of the new testament, which is shed for many for the remission of sins." - Matthew 26:28 KJV

Jesus brought a new covenant by His death, burial, and resurrection. This new covenant supplied the blood that would remit sins once and for all.

"Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us." - Hebrews 9:12 KJV

God’s blood obtained eternal redemption for all of us – “all nations.”

"And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem." - Luke 24:47 KJV

On the day of Pentecost, the church began. The Gospel message proclaims remission of sins when we repent and are baptized in Jesus name, with the promise of the gift of the Holy Ghost because we have turned from sin to live for God. For he has purchased us with His own blood.

"Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call." - Acts 2:38-39 KJV