How do we know faith alone leads to salvation?

Faith alone leads to salvation as commanded in Acts 16:31, where Paul emphasizes that belief in Christ is not just good advice but a command. This aligns with the principle that salvation is by grace through faith, affirming that it is not our works but our relationship with Jesus Christ that secures our salvation. In sovereign grace theology, this highlights that our faith itself is a gracious gift from God and not a result of our own volition or merit, which is the essence of being justified by faith.