I believe that human morality, rather than flagrant sin, is the greatest obstacle to the gospel today. If you ask the average law-abiding person why he expects to go to heaven, the answer will be some form of “because I’ve been good.” The rich young ruler (see Matthew 19:16-20), the prodigal son’s older brother (see Luke 15:28-30), and the Pharisee praying in the temple (see Luke 18:9-12) all had this in common: They were confident of their own goodness. Their attitude is replicated throughout our society. And the more religious a person is, the more difficult it is for that person to realize his or her need for the righteousness of Jesus Christ.
Jerry Bridges