"Therefore there is now no condemnation for those who are in Christ Jesus."
If there's no condemnation in Christ, then how could anyone ever get "out" of Christ, unless there really was some manner of condemnation, even in Christ? Why would the Holy Spirit inspire such a statement if there really was condemnation in Christ?
If salvation is something that can be lost, then there must be a potential for condemnation, even for those who are in Christ. This verse is so incredibly clear and powerful. No condemnation for those who are saved. This means that there's nothing you can do--nothing whatsoever--to lose your salvation. If it doesn't mean that, then what does it mean?