Jesus is part of three persons Who together are God. God the Father, the Lord Almighty; Jesus Christ, His Son; and the Holy Spirit, the very spirit of God. These Three are the One and the only God.
In First John, Chapter 5, verse 7: For there are three that bear record in heaven, the Father, the Word [Jesus] and the Holy Ghost. And these three are One. [King James Bible]
We were created by God. We are human. God doesn’t sin, but we do. Sin is a fact of our lives, and there are consequences. Sin affects our lives and the lives of people we love. Sin is destructive, and we don’t always see the pain it causes.
God is holy, and He cannot unite Himself with sin. This was a dilemma, because everyone who is human sins. God Himself provided the solution.
A sacrifice of blood was required by the Father for our sins to be forgiven. This sacrifice had to be sinless and perfect. The sacrifice was Jesus Himself.
Jesus, Who was fully human and also fully God, was crucified to atone for our sins. Jesus saved us by carrying the load of the sins of all people into His own death.
In Romans, Chapter 5, verses 8-10, it is written: But God demonstrates His own love for us in this: while we were still sinners, Christ died for us. Since we have now been justified by His blood, how much more shall we be saved from God’s wrath through Him! For if, when we were God’s enemies, we were reconciled to Him through the death of His Son, how much more, having been reconciled, shall we be saved through His life! [NIV Bible]