In the Law of Moses God established the system of sacrificing animals to temporarily cover the sins committed by Israel. In this Old Testament covenant the sacrifices had to be repeated over and over each year.
Hebrews 10:4 – It is not possible that the blood of bulls and goats could take away sins.
To permanently remove the sins of men the sacrifice had to be a human being and that person had to be without blemish (i.e. without sin). The wages of sin is death according to Scripture. God cannot lie and God must always act justly. There was no living person who was without sin, not only because of their actions but also because everyone born after Adam had the sin nature of Adam by imputation. God solved this dilemma by Himself becoming a man in order to qualify as the needed sacrifice. Of course God was already without sin. There was no other way to save man from eternity in hell while at the same time meeting the requirements of a just God.
Jesus, God in the flesh, died on the cross in our place to pay our sin debt which restored our fellowship with God and allowed us to have eternal life through faith in Jesus Christ as Lord and Savior. So this is the gospel of Christ. God sent His only begotten Son, Jesus Christ, to earth to die a horrible death on the cross as payment for the sins of man. Jesus was buried and on the third day God raised Him from the dead and Jesus ascended back to heaven where He sits at the right hand of God. Jesus defeated death so that those who believe in Him will inherit eternal life with Him in heaven. God has given us everything. Now can you understand why I love Jesus so much?