Sometimes we've just had enough. Enough difficulties. Enough sadness. Enough loss. Enough pain and heartache. Yet, we persist. What is it that keeps us plugging along, doing life, and somehow knowing that we must put one foot in front of the other? There seem to be a variety of answers to this question, depending on the person, the day, the moment. For some, it is faith--faith in something larger than ourselves. Perhaps we are uplifted by something we read, or a piece