macarthurcommentaries.com ... Why do you call Me, 'Lord, Lord,' and do not do what I say? (Luke 6:46)
Jesus closed His sermon by challenging His hearers to make a choice. People face decisions throughout their lives, choices about diet, medical care, lifestyle, career, relationships, and education, to name a few. But the one that far overshadows all the rest is the choice that fixes a person's eternal destiny. The concluding parable of the Sermon on the Mount reveals two aspects of that decision: its nature and its consequences.
Religion thrives in the world because people want to go live after death in heaven, however they define it. Whether conceived of as the nirvana of Buddhism, the paradise of Islam, the eternal progression to godhood of Mormonism, or the freedom from the cycle of reincarnation and union with Brahman of Hinduism, religions offer some form of bliss, happiness, fulfillment, or reward on a higher plane after this life.
In this age of tolerance and rejection of absolute truth (especially religious truth) there is a widespread belief that anyone who is sincere in their faith will go to heaven. Even many professing evangelicals hold to an inclusive view of the gospel. God, they maintain, will accept those who are sincere in their religious commitment, even if they never leave their false religions, or profess faith in Jesus Christ. In fact, some even argue that they may actually be aided in coming to God by those false religions...