We cannot have eternal life and heaven without God's forgiveness.
Forgiveness is available.
For God so loved the world that He gave His only begotten Son that whoever believes in Him should not perish but have everlasting life. However, forgiveness is not automatic. Not everyone who says to Me, 'Lord, Lord,' shall enter the kingdom of heaven. It is impossible for God to allow sin into heaven. God cannot ignore sin, something we have all committed.