Sin City - please forgive me

In less than two hours, in the town i live in, will be staged a marathon- Mid Semester Examination. I am to run on Quantum Field. But I am stuck as a classicle particle in an infinite potential well. Tunneling is not implied.
I sometimes wonder on what basis we choose the trivial principles of our lives. Principles like priorities, statements of sweet nothings, particularity in celebrations and a lot of other things that I don't happen to recall now. Priorities are weather cocks, time dependent, cheesy and deceitful. I don't set them. They come hopping around and clutch me. They are super-fluous, change shapes in the influence of external fields like peer tolerance.
Sometimes I wonder, why I wonder at all, and mess up things that should have been on the prioprity list, and then crib, and crib more.
Let me see how the afternoon gives way to evening, then iI will crib further.