Eh. This pain has tortured me for almost a month now. My productivity in terms of research has been near zero. (Maybe this is because my productivity was 200% before this, and I used up my karma for this period :-p) Yet, I can not sleep all the time for so many days, so I found something meaningful for me to do while I was waiting to get well. I remember when I was young, my parents asked me to practice and write Chinese calligraphy, the point was (and is) not to write beautiful characters, but to get a feeling of tranquility, or in other words, a peaceful mind that is harmoinzed with the body. I would say, in retrospect, this training has very deep impact on me. I enjoy a peaceful mental state, and my creativity is the highest when I can find this state of serenity. I concur with some ancient artist who once said that he was most creative when he was at 3 places: "on horse", "on pillow", and "on toilet". So in the last month, while I was not thinking about my research, I enjoyed appreciating the calligraphy by Wang Xizhi. He was considered to be the "god of calligraphy" by many. Above is his representative work called "Lan Ting Xu" (Preface to the Proceedings of Annual Meeting of Poets in Lanting :-p).
ps. Thanks to Gordon for pointing out a spelling mistake