How do we know Christ is our righteousness and sanctification?

The Apostle Paul explains in 1 Corinthians 1:30 that Christ Jesus has become our righteousness, sanctification, and redemption. This means that believers are not justified by their own works or progressive holiness, but solely through the merit of Christ. Our standing before God does not depend on our ability to grow in holiness, which is inherently flawed, but on Christ's perfect righteousness. Consequently, as believers, we are called to rely on Him completely for our salvation and sanctification, recognizing that any growth in grace comes from His work in us, not from our own striving.