Can Good Works Prove Salvation?
There is every reason to think that those who have believed in Jesus Christ as Savior and are consequently born into God’s family will experience a changed life to some degree. Some would say that this changed life is evidenced by good works which proves they are saved. If that is true, then the converse is true: if there are no good works, then there is no salvation. In this view, good works (sometimes called “fruit” or evidence of a changed life) prove or disprove one’s eternal salvation.
Some passages are used to contend that works can prove or disprove one’s eternal salvation. Probably the most common are James 2:14-26, John 15:6, and Matthew 7:15-20. But James is writing to Christians about the usefulness of their faith, not its genuineness. Likewise, in John 15:6 Jesus is talking about fruitless believers and compares them to branches that are burned, in other words, not of much use. Matthew 7:15-20 warns against false prophets (not believers in general) who can be evaluated on the basis of their evil deeds or heretical teaching (not an absence of works in general).
posted by HK Flynn