Jesus said in Matthew 7, "Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven..."
The sad truth is that there are millions of religious people, serving in churches all over the world, who have yet to have a genuine salvation experience. They emulate the example of the people around them and believe their actions and deeds are providing eternal security. Their "conversion" came out of a desire for stability and prosperity. Their hearts have never been truly broken by the conviction of their sin.