The Bible says in 1 Corinthians 15:3-4 that “Christ died for our sins according to the Scriptures, and that He was buried, and that He rose again the third day according to the Scriptures.”
Jesus Christ, the eternal Son of God, became a man to save His people from their sins (Matthew 1:21). This is the good news because God knew we could never save ourselves. Eternal salvation is a gift received and not something one works for or earns. The Bible says “By grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast” (Ephesians 2:8-9).
This means that getting to heaven does not depend on how well we live. If getting to heaven depended on how well we live, then no one would get to heaven, because no one can live well enough to get there. The good news is that you do not have to try to be good enough.
God’s Son, Jesus Christ was, and is, perfect righteousness to those who beleive upon Him in faith. Jesus was conceived by the Holy Spirit and born of the virgin Mary. He lived a perfect life of obedience. He never once sinned - in thought, word, or deed. He would die a sacrificial death on the cross, taking upon Himself the full weight of God’s righteous wrath due to sin. Three days after His death Jesus rose physically from the dead and soon thereafter ascended into heaven where He is currently seated at the right hand of the Father.
In response, the Bible commands all people to repent and believe upon God’s Son. Jesus said, “Repent, and believe the gospel” (Mark 1:15).
Repentance is to turn from your own self-righteousness, or lack thereof, and turn to Christ, who is perfect righteousness (1 Corinthians 1:30). It is to 'change ones mind' about who God is and who we are, and to live a life in light of such repentance.
Jesus said, “If you love Me, keep My commandments,” and James states that “faith by itself, if it does not have works, is dead” (James 2:17). A true faith in Christ always produces obedience to Christ.
However, our motive for obeying Christ is not out of fear of going to hell. Rather, we obey Christ out of love and thankfulness because we have already been saved by His grace.
We must remain steadfast in the one true Gospel, rejoice in it, proclaim it, and never deviate from it.