It is an absolute fact that you will spend eternity somewhere. There are only 2 options: heaven or hell. Many professed Christians are banking their eternity on what they think they believe. Some might say they will go to heaven because they are a good person. Others might say it is because they are active in church (merely playing the role). Others might say because they pay their tithes, serve the poor, or do any other number of religious deeds they will see the “pearly white gates”. Some think calling themselves a Christian or saying they believe in Jesus seals the deal (contrary to James 2:19), yet never do they open their Bibles (if they own one), conversations about Jesus are taboo, they only pray to God when they need something, Christmas and Easter services are the only times they make it to church, they have no Christian fellowship, truth might be relative and Jesus isn’t the only way, or the whole of their life is marked by habitual practice of sin, but they are still Christian because they “believe in their heart”.
The heart is deceitful above all things, And desperately wicked; Who can know it