How do we know our perfection in Christ is true?

The truth of a believer's perfection in Christ is grounded in the doctrine of union with Him, as articulated in John 17:23. In this verse, Jesus communicates that just as He is in the Father and the Father in Him, so too are believers in Christ. This spiritual union implies that believers are not only identified with Christ in His suffering and resurrection but also in His righteousness. Thus, God views them as perfect because they are covered by the righteousness of Christ, which is imputed to them by faith.

Furthermore, the entirety of the believer’s spiritual life and growth stems from this union. As Paul explains in Ephesians 1:4-5, we are chosen in Him before the foundation of the world, predestined to be adopted as sons. This means that our perfection is not achieved by works but is a result of grace through faith in Jesus. The assurance of eternal communion with Christ, grounded in this doctrine, provides believers with confidence in their salvation and identity as perfect in God’s eyes, secured throughout eternity.