The proportion of his faith ...
Since we have gifts that differ according to the grace given to us, each of us is to exercise them accordingly: if prophecy, according to the proportion of his faith; if service, in his serving; or he who teaches, in his teaching; or he who exhorts, in his exhortation; he who gives, with liberality; he who leads, with diligence; he who shows mercy, with cheerfulness. -Romans 12:6-8 NASV
Have you ever spoken extemporaneously in front of a group of people? It is an interesting phenomenon. You begin by speaking a sentence or two from your mind and then words just begin to flow. I somewhat liken gifts and faith that way. It is the way that the disciple Peter once walked on water. He began with the word of Christ. In faith he took a step - a very natural action. When his feet touched the water the natural became supernatural. So it is with gifts and faith.
In my life I have seen this in operation as I have exercised faith in God by exercising the gifts that he gives me. Often in conversation I might discern a wise word and speak it. Sometimes I sense a leading and I follow it in faith. Many times I read a scripture and simply obey it. God has given each of us gifts. Like the gift of salvation, each gift is actuated as we respond by exercising faith and moving in it. And as we are faithful, God increases these gifts within us.
Teach us to stir up the gifts within us Lord. Help us to be faithful with the gifts you have graced us with.