How can a sinner enter heaven?

The pathway for a sinner to enter heaven is through faith in Jesus Christ alone. Since all have sinned and fall short of the glory of God (Romans 3:23), no one can claim righteousness on their own. Christ's work on the cross serves as the fulfillment of the requirements of God’s justice. He took upon Himself the sins of His people, making a full atonement that allows sinners to be declared righteous through faith. Therefore, it is not human effort or merit that grants access to heaven, but the grace of God exercised through Christ. Believers are assured of their entry into heaven because their identities are wrapped in Christ’s righteousness, as stated in Revelation 21:27 where only the pure can enter.