"To sin means to fall short of God's holy standards. Sin is what ended Eden's paradise. And all of us, like Adam and Eve, are sinners. You too are a sinner. 'All have sinned and fall short of the glory of God' (Romans 3:23). Sin separates us from a relationship with God (Isaiah 59:2). There's a huge gulf between us and God, and there's nothing we can do to cross it. Sin deceives us and makes us think that wrong is right and right is wrong (Proverbs 14:12). It makes us imagine that we're okay when we're really not.
Sin has terrible consequences, but God has provided a solution: 'The wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord' (Romans 6:23). Jesus Christ, the Son of God, loved us so much that He became a man to deliver us from our sin (John 3:16). He came to identify with us in our humanity and our weakness, but he did so without being tainted by our sin (Hebrews 2:17-18; 4:15-16).
Jesus died on the cross as the only one worthy to pay the penalty for our sins demanded by the holiness of God (2 Corinthians 5:21). On the cross, He took upon Himself the Hell we deserve, in order to purchase for us the Heaven we don't deserve. Being God, and therefore all-powerful, Jesus Christ rose from the grave, defeating sin and conquering death (1 Corinthians 15:3-4, 54-57).
When Christ died on the cross for us, He said, "It is finished" (John 19:30). The Greek word translated 'It is finished' was commonly written across certificates of debt when they were cancelled. It meant 'paid in full'. Christ died so that the certificate of debt, consisting of all our sins, could once and for all be marked 'paid in full'. " - an excerpt from Heaven by Randy Alcorn