I agree that our faith is not faith unless it is lived out and this is "normally" by our physical actions and should be visible to others. Faith that lives only in the intellect, is not really faith. However, I also believe that there are times when faith is being lived out without VISIBLE/PHYSICAL signs. For instance, as someone mentioned, praying for a situation that you have been unable to affect. There have been instances in my life when God has allowed me to discern a spiritual conflict, but then told me to "Wait", that much prayer was needed first and I wasn't supposed to respond (physically) to the situation yet. Being the type of "mothering" person that always needed to be in control and "fix" the problem, this required HUGE HUGE amounts of faith on my part to "wait". I believe there are also other instances when God is dealing with someones heart and change is occurring inside, but no visible sign is seen - YET. Eventually, faith will produce action, but lack of physical "action" does not always mean lack of faith.