Let's do a quick rundown on מוקצה. The word מוקצה, of course, basically mean "set aside". There are things we set aside on Shabbos (and Yom Tov) because Shabbos is really, really important and violations are really, really bad. (That is my high level, executive summary of the Mishna Brura's introduction to siman 308.) Doing melacha on Shabbos is really bad. Also, Shabbos should be really, really special. (Yikes... talk about ירידת הדורות!) Since every Jew knows that, things that would bring one to violate the Shabbos or cheapen it's sanctity, are not at the forefront of our minds. There are, to one level or another, מוקצה. Because over our history, there have been times when Klal Yisrael is not as careful with Shabbos as they should be, Chazal have baked some basic principles into practical halacha. There are essentially four levels of מוקצה: Holy Writ and food -- Not set aside at all, you can move them just cuz. Utensils whose main use is permitted on Shabbos; sp...
This is a paraphrase of the pasuk in t'hillim 84:7 -- "mei'chayil el chayil" -- which means "from strength to strength". In this case, it is my thoughts and ideas to those who are strong enough to be interested :)