Often I meet with people who serve in what they think are seemingly small ways in small places. They are frequently discouraged by loneliness, feeling that their acts of service are insignificant. When I hear them speak, I think of one of the angels in C.S. Lewis' book "Out of the Silent Planet". He said: "My people have a law never to speak of sizes or numbers to you. . . It makes you do reverence to nothings and pass by what is really great."
Sometimes, culture says bigger is better - that size is the truest measure of success. It takes a strong person to resist that trend, especially if he or she is laboring in a small place. But we must not "pass by what is really great". It's not that numbers aren't important (after all, the apostles counted their converts; See Acts 2:41). Numbers represent living people with eternal needs. We should all work and pray for large numbers of people to enter the kingdom, but numbers mustn't be the basis for self-esteem.
God doesn't call us to find fulfillment in the amount of work we do for Him, or the number of people who are a part of that work, but in faithfully doing our work for His sake. Serving our great God with His strength in a small way is not a stepping-stone to greatness - it is greatness. Anyone doing God's work in God's way is important in His sight. God appreciates your great work!