In the context of enumerating the advantages of addressing believers as "saints" without reference to "church," this episode brings home the evidence of professed sainthood: works and growth in Christ. The episode cites the parable of the dragnet (Mt 13:47-50), which claims that many "bad fish" would associate themselves with the visible church, without actually being saints. And Christ said as much in Matthew 7:22-23, where association with Christ without conversion would be commonplace among nominal believers at the judgment. One of the common features that Scripture cites as evidence of saving faith is works. While believers are not saved by works, the natural manifestation of saving faith is subsequent good works. He who abides in Christ naturally bears fruit. (John 15:5) Those who merely associate with Christ in the visible church "practice lawlessness." (Mt 7:23) Peter held that Christians should grow spiritually. Failure to progress minimally indicates "blindness" or "short-sightedness" and MIGHT indicate that one has not received the calling as a saint. Peter admonishes believers "to make certain about his calling and choosing." The Biblical expectation of sainthood is therefore demonstrable fruit and works.
Saved to Serve
This episode reemphasizes the futility of a sin-focused life apart from serving God. Such a misplaced focus explains why many apparently plateau in their Christianity and why most Christians are "unemployed" Christians. While Christians definitely should address issues of sin, the focus of the Christian life is on Christ, abiding in Him, and implementing His instructions. Service to God is the reason God saved us.