This episode highlights the natural human tendency to substitute God's standard for good works with human ones, mostly centered on outward observance. One of the primary aims of the sermon on the mount (Matthew5-7) is to explode reliance on outward morality divorced from internal embrace of the commandments. The Pharisees were often guilty of emphasizing external observance of the Law without grappling with the heart's penchant for lawlessness. Christ concluded that Pharisees who continued to insist on their own righteousness, maintaining that they were good people, were headed for judgment. (John 9:39) By contrast, those who acknowledge their sick condition and are utterly despondent over any ability to do good--these are candidates for salvation who rest completely on the finished work of Christ.