A couple of weeks ago I was walking along Tottenham Court Road. I didn't really notice what was going on as I walked and was, essentially, not aware of anything particularly salient happening as I did so. In fact, were it not for the fact that I am writing about this in a blog that almost nobody is ever likely to read, I would almost certainly have forgotten completely about those moments. The same could be said for almost the entirety of life, during the vast majority of which nothing noteworthy generally occurs. However, most importantly, during that walk I felt happy. If I were to tweet 'I am happy' repeatedly, every day, as a  looped signal, ad infinitum, I doubt that anyone would be interested!