"Indeed, the very hairs of your head are all numbered." Luke 12:7
Unfortunately, many of us think we are not significant enough to be used by God for great things. We might say, "Oh, I'm only a repairman, or only a housewife." We think that if only we had a more prestigious title - such as doctor or professional athlete...God could use us to do mighty things.
Perhaps the prophet Amos thought that way when God called him to serve. "After all," he could have said, "I am only a shepherd. Who will listen to me?" But instead of questioning his status, he obeyed and became a powerful voice for God.
Remember, with God there are no "onlys." No matter what you perceive of yourself, God sees you as having potential for great service.