What does Colossians 2:17 mean?
Paul refers to the Old Testament legal requirements, from verse 16, calling them "a shadow of the things to come." The Greek word skia, translated as "shadow," can also refer to "shade, a sketch, or an outline." Paul contrasts this with the Greek word sōma, translated as "body." This word can also mean "reality or substance." This is the reason adherence to the Law is not a requirement: The Law was merely an outline; it is a shadow, or a hint of things to come. Christ is the actual substance. In making this statement, Paul did not speak against the Law, but rather spoke of Jesus as superior to the Mosaic law. It is the difference between a book and the author of a book. The Law could not exist without the Author. Jesus serves as the author of life (Acts 3:15). He fulfilled the Law without contradicting it. Jesus taught, "Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them" (Matthew 5:17).Colossians 2:16–23 is an application of the ideas Paul mentions in the previous verses. Verses 6 through 15 explained the supremacy of Christ over deceptive, human-based thinking. In this passage, Paul explicitly states that rules, rituals, and self-denial are not the path of spiritual growth. Trying to grow, spiritually, through these efforts is as impossible as a body part developing naturally while severed from the head! Living under severe rules might look good to others, but it's not how God has called us to relate to Him as Christian believers.
In this passage, Paul warns Christians not to be taken in by deceptive arguments. These claims are attractive, but are merely tricks: they sound true, but they are not. Arguing for self-denial, legalism, visions, and other practices only looks good to observers. None of these are the real source of spiritual growth. Paul emphasizes the way Christ accomplished everything we need to be justified before God. As a result, there is no reason for believers to pursue these false, shallow ''shadows.'' We have the real substance: Jesus, so we should follow Him.