How does justification occur according to Reformed theology?

In Reformed theology, justification is viewed as a legal act of God where He declares the believer righteous based on the righteousness of Christ imputed to them. This truth is outlined in Romans 5:1, stating, 'Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ.' The work of the Holy Spirit is integral to this process, as He applies the benefits of Christ's atonement to the believer, creating an unbreakable link between faith and God's grace. It is through faith alone (sola fide), that believers receive this justification, highlighting the sufficiency of Christ’s sacrifice and the grace of God.