Experiences of 'clinical death', or 'near death' accounts cannot conclusively prove the reality of life after death. The final authority on this subject is God Himself and in particular the Lord Jesus Christ, who made authoritative and verifiable claims about an afterlife when He was here on earth.
Jesus spoke about Heaven very plainly before He died, at the famous Last Supper in this way; "In My Father's house are many mansions. I go now to prepare a place for you. If it were not so, I would have told you." Before raising His dead friend Lazarus from the grave He said, "He who believes in Me will live, even if he dies".
When Jesus was dying, He promised heaven to a remorseful criminal dying near Him, "Truly I say to you, this day you will be with Me in Paradise".
What Jesus said was confirmed by what He did. On the following Sunday (Easter Sunday), Jesus Christ rose from the dead. He spent the next six weeks preparing His followers (more than 500 of them) for their task of telling the world that heaven was now accessible through Him. He said that, "Because I live, you will live also."
But how is He the key to Heaven? By breaking God's Laws (The Ten Commandments) all humans render themselves unfit for heaven. Like God's nature, heaven is a realm of pure goodness and perfection and humans are not that, as guilt in our lives often reveals. However, Jesus Christ paid the penalty for our disobedience in His death upon the cross. It is only when you truly believe what Jesus did for you and give your life to Him that you can be forgiven and made fit for Heaven.
The Bible, says "it has now been revealed through the appearing of...a Savior, Jesus Christ, who has destroyed death and has brought life and immortality to light through the Gospel" (2 Timothy 1, verse 10). •