This episode provides the reason why most unbelievers consider themselves good people capable of doing good works. As a consequence of the great exchange, where all people exchange the truth of God for a lie and worship and serve themselves, "good" and "bad" is primarily measured by service/disservice to the object being worshipped. Mankind becomes the measure, and this idolatrous thermometer leads to assessments in which men commend themselves by themselves. (2 Cor: 10:12) This faulty assessment of course misses the true standard of God in which God is the object of worship. The episode closes with an exhortation to do good works by embracing the standard of God in the person of Christ.
Re-defining ‘Good’ to Serve Mankind
This episode elaborates on the great exchange of Romans 1:18-23, in which mankind exchanges the glory of God for an image in the form of himself. This exchange is critical to understanding unbelievers' basis for doing good works. Morality and "good works" are ultimately defined by the object they serve. Mankind is the fundamental god of unbelievers and "good works" describe the relationship of man's works to man's god, i.e. himself. So not surprisingly, man commends himself when his works serve himself, even calling his evil works "good." Isaiah commented on the disconnect between divine morality and man-made morality: "woe to those who call evil good, and good, evil." (Is 5:20) The last part of the episode explains how the great exchange is reversed by following Christ.