Why do Christians need to confess Christ as Lord?

Confession of Christ as Lord is vital for genuine faith as it demonstrates one's recognition of His authority and sovereignty. In Romans 10:9, we see that declaring with your mouth, "Jesus is Lord," is integral to salvation, emphasizing that mere verbal acknowledgment is insufficient without heartfelt submission. This confession involves a deep commitment to follow Jesus in surrender of one's life, acknowledging Him as the guiding authority. It is a testimony of the transformative work of the Holy Spirit within a believer that moves them from rebellion to submission. This aligns with the biblical principle that true faith is accompanied by a changed life marked by obedience and reliance on God’s grace.