Sin is anything contrary to the nature of God. Every person is born a sinner and every person commits sin. God is holy and hates sin. Because He is just, He must punish sin. The punishment for sin is eternal separation from God.
Because I am born in sin, no action of mine can accomplish anything toward my salvation. I cannot get to heaven by being good, attending church, praying or anything else. I am helpless and unable to make myself worthy of heaven.
God gave His Son, Jesus Christ, to be my Savior by paying the penalty of death for my sin in my place.
Jesus paid for all my sin by dying, shedding His blood and rising from the grave. His blood paid my penalty. His resurrection defeated death. He is now in heaven, interceding for me before God.
Believing is trusting what God did for me. I can add nothing to my salvation. When I believe that His death was a complete payment for me, He gives me eternal life.
Once saved, I cannot lose my salvation. No creature or thing can take it away from me. I cannot lose it by any action of my own.
