Will it be worth it? Absolutely. I saw this on a sign on a bridge over the road at a point somewhere along the route as I was doing the great north run on Sunday.  It has stuck with me.  By mile 9 is definitely was not easy, and by mile 10 onwards it was just a case of keeping putting one foot in front of the other, one step at a time. 2days later it is still not easy: I am still aching, getting up and down stairs is a bit of a challenge, and I have a stubborn blister that won’t settle.  (This is not a whinge, I…