The following is an illustration straight from the Bible of how you can know for cure that you will be in heaven when you die. You can reference all Scripture quoted on these pages from the King James Bible.
“These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.” – I John 5:13.
At the end of the illustration, you will have the knowledge you need to take you to heaven, it is solely up to you whether or not you choose to believe and accept it. I pray that God will open your heart to enable you to understand these truths and welcome you into the Kingdom of God.