How do we know that Christians will never achieve sinless perfection?

The doctrine of remaining sin emphasizes that complete eradication of the sinful nature will not occur until glorification. Verses like Philippians 3:12 affirm the notion that we have not yet reached perfection: 'Not that I have already obtained it or am already perfect.' The New Testament consistently warns against the expectation of sinless perfection in this life. This theological understanding fosters a realistic view of the Christian experience and cultivates reliance on Christ's atoning work and continual grace rather than self-righteousness.