How do we know that baptism is necessary for salvation?

While baptism is necessary as a demonstration of faith, Scripture teaches that it does not save us in itself. Mark 16:16 states, 'He who believes and is baptized will be saved,' indicating that genuine faith precedes baptism. This aligns with the Reformed perspective that salvation is by faith alone in Christ, evidenced by obedience, which includes baptism. It is essential to understand that being baptized is a response to faith and not a means of salvation itself; salvation is rooted solely in Christ's work. The thief on the cross serves as an example that salvation is granted upon faith regardless of baptism.