Well, in Judaism there are really a number of different "souls" or levels of the soul. Each is related to something different be it the physical body, feelings, the intellect... The neshamah yeterah is related to Shabbos and the "feel" of a good Shabbos.
So, is it a state of a soul at some particular time during the Shabbos or are the states concurrent? How does one reach these levels? Or what sparks the soul? I'm assuming it is some kind of mystical experience, then, right?.