Same run..different journey

On Saturday I went out on a 15 mile run that I have done before. Wow was this a new journey. 2 runs on the same course are never the same, and I learned that first hand. The whole run was a struggle. But I didn't know the term struggle until mile 13. I felt like the "wall" that people always talk about. This is where you dig deep and learn what you are made of.