A Roman centurion asks Jesus to heal his dying servant. Jesus agrees to help and begins making his way to the centurion's home, but the centurion tells him not to bother making the trip. He says that it would be enough for Jesus just to say the word for the servant to be healed. The Bible then says that Jesus "marveled" at the centurion's faith.
How could Jesus, whom Christians believe to be God incarnate, who knows all things, be amazed by anything a human does? There must be something special about faith to cause Jesus to be amazed.
Christians are called to possess the same kind of faith as the centurion. It may not seem possible, but if we want it, God helps us obtain and maintain the kind of faith that can amaze even God himself. And once we have that amazing faith, it will lead us to share joy, hope, and love with others around us.