What does 'must be saved' mean in the context of Acts 4:12?

The phrase 'must be saved' in Acts 4:12 signifies that salvation is not optional but essential for all humanity. Peter’s declaration emphasizes that all people are in dire need of rescue from their sins and that this salvation is exclusively found in Jesus Christ. This aligns with historic Reformed theology that teaches the total depravity of man, meaning that every individual, unredeemed, is lost and in need of the saving grace that only Christ can provide. Thus, it highlights the urgency of responding to this truth with faith.