Faith is a committal of our life to Christ. Some time ago there was a serious forest fire in New Jersey. Soldiers were sent in to help fight the fire. Eighty soldiers found themselves trapped by the fire unable to see there way out. A plane flying overhead saw their plight and radioed this message to them.
Salvation is an Expression.
The Word of God instructs us to make a public confession of our faith in Christ. Some may say that this just isn't necessary. But God does not have any secret agents in His army. We ought to want to declare our faith in Christ to others. We will not hesitate to express our allegiance to a particular sports team or political party.