I found reading about the competing ideas concerning present understanding of the human soul to be almost a form of a spiritual exercise. This article mentions quantum physics, Buddhism, Platonism, Augustine and Calvin, all together. Another resource mentioned is the Center for Spirituality and the Mind, at the University of Pennsylvania. I also remembered how a psychiatrist friend told me recently, "the things we know now about the human brain, were largely unknown even 10 years ago".
In retrospect, there are lots of new ideas here, and many different brilliant minds trying to grasp the inner workings of the mind, even at the microscopic level. For some more conservative Christian folk, all this thought and science might seem too theoretical and threatening. Not so for me; I love reading and learning. My favorite bit about Oxford physicist Roger Penrose:
"....Penrose proposed that consciousness was a quantum computation within the brain, and infinitesimal collapse of quantum information into classical information that takes place at the level of the neurons."
And people say there is no God.