All men have secrets and here is mine

I keep reading and reading but nothing is going in, I need to get this essay done but everytime I read over something I think: "Do i understand what I just read" - The answer is no. I cant get my brain to take in anything and I've been sat here reading since at least twelve. Why oh why do essays become the hardest thing in life right when you dont want it. At least The Smiths are keeping me positive.