The Good news is that God himself saves sinners. This was achieved through the perfect sinless life, death and resurrection of the God-man Jesus Christ!
His sinless life - Jesus fulfilled all the righteous requirements of the law in our stead. A life of obedience. where the first man failed the last Adam was victorious. His sinless life was vicarious. When we have faith in Him His perfect sinless life is imputed to us sinners and our sin nailed to the cross. (Heb 7:26; 2 Cor 5:21)
His Death - "Although they know God's righteous decree that those who do such things deserve death, they not only continue to do these very things but also approve of those who practice them." Romans 1:32...
Jesus paid the price for the wages of mans sin, he took our punishment (for those who believe) that we so richly deserve.
His Resurrection - Christ defeated death, death has now, through Him, lost it's sting for those who believe and place their faith in Him. In the resurrection God demonstrates His magnificent power over sin and death bringing life to those of faith. Securing eternal life for all His children in Jesus Christ our Lord, Judgement for those who don't repent! (Romans 4:24-25; Acts 17:31
That's just some of the basics of the good news. The good news is all about Jesus Christ. Jesus Christ our Lord is the Good news. The good news is God centered. (Of course it doesn't stop there. Christs sinless life, death and resurrection also help his people through Christs mediatorial role in their walk )Sanctification- Heb 7:25 et al)).
The truth of the good news is that sinners can be forgiven their sins, be reconciled to God and have eternal life through everything that God has done in Christ Jesus our Lord.
For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life - John 3:16
Jesus said to her, “I am the resurrection and the life. The one who believes in me will live, even though they die; - John 11:25