I ran a marathon once. It was one of the hardest experiences of my life. I trained for months and months--running day after day, mile after mile. Finally, the anticipated day arrived. I now had the chance to prove that all my preparation and hard work had been worth it. I started running and felt great. Then, at around 18 miles, my body gave up on me. My many months of struggling had been for nothing. It was too hard. I had to give up.
Then, something inside me reminded me that I was ready for this race, and that I could do it despite what my brain was telling me. I started off once again, and finished the race--tired, but triumphant.
Our personal capacities are often more than we know, and many times, we don't find out until they are tried and tested, and then we see if we are enough for the challenges that face us.
Maybe the biggest thing that we learn is that we don't have to carry ourselves through those hard times.
I like the song "Stand" by Rascal Flatts.