"We measure a ministry by the greatness of the man when we should be measuring the ministry by the greatness of our God."

Look at Jeremiah and Noah. These two men especially had a great ministry because of the God they served not because of how many they served. Just because you have one hundred or a thousand in your church or you travel over the country preaching doesn't mean you have a great ministry. If you are not relying on the God that gives the ministry your ministry will never be great in of yourself but it will be great because the God that you serve is great.