Jesus came to explain the truth about God and to pay the price for man's rebellion.
John 1:18: “No one has ever seen God, but God the One and Only, who is at the Father's side (Jesus Christ), has made him known.”
2 Corinthians 5:21 says, “He (God) made Him (Christ) who knew no sin to be sin on our behalf, that we might become the righteousness of God in Him.” In other words, Jesus died because of our sins, so that we wouldn't have to pay the penalty demanded by true justice—eternal death.
Jesus died for our sins, and was raised victorious over death.
1 Corinthians 15:22: “For as in Adam all die, so in Christ all will be made alive” and again, (verses 54-57) “Death has been swallowed up in victory. Where, O death, is your victory? Where, O death, is your sting? The sting of death is sin, and the power of sin is the law. But thanks be to God! He gives us the victory through our Lord Jesus Christ.”
Jesus Christ is the only way to have our sins forgiven and to have a relationship with God which results in eternal life.
“But God demonstrated His own love toward us, in that while we were yet sinners, Christ died for us” (Romans 5:8). Jesus said “I am the way, the truth, and the life. No one comes to the Father except through Me” (John 14:6).