So: what I think is happening in bobby's head.

What thoughts are, in the brain, are when connected neurons recognize a similar timing in response, based on the neurons below it. (maybe it has a switch, neurons which are stimulated from one "type" of group all get pumped full of either sodium or potassium to differentiate two "input types", talking out of my ass though). So all of our "thoughts" are these connections between similar "inputs", or lower level thought, and they become connected because they fire at similar times.

What bobby is experiencing is when simultaneous things happen, instead of recognizing that most of similarities are completely coincidental, is associating them in his mind, and his conscious mind becomes confused as it analyzes why these things are connected, when they don't seem like they should. I speculate that this "lag" which the brain has to capture, between stimuli with 5 seconds, 5 minutes or even 5 years of things which are related and need to be connected, this long chain of "coincidences" which happen further and further apart, is memory. I speculate that the transcription of thoughts into the memory is the "voice" in our head, or our consciousness, or whatever. Bobby's "problem"(though it very well could improve his life) is that he is paying extreme attention to everything happening around him (possibly as a result of higher-than-ever-before levels of neurotransmitters from his new Zoloft prescription), and noticing more connections between everything, the "voice" got louder, and everything seemed terribly important, because the subconscious thought it was important enough to start the memory inscription process.

If you think about religion, and how it must have originated: When you were in a tribe, with only basic knowledge of your world, and no knowledge of scientific method, or particle systems, or disease transmission, it is not suprising that your brain, recognizing the importance of things like rainstorms and death, would grasp for circumstances and ideas which correlate with, or "influence" future events. Also, the idea that an inanimate object could do action was also foreign. Sure, dead wood just sat their and decayed, but a living tree could grow, and make fruit, and animals could move around, and even attack you. They knew of nothing that was both moving, "active" and without consciousness. This led the birth of the belief in spirits. The rain would come after someone has a nightmare about a strange creature, and they would believe that the strange creature actually caused the rainstorm. Or whatever. From this, beleif in fewer, more complex gods or spirits arose, as the brain started asking higher level questions. For thousands of years, kids have probably asked their parents "Why does it rain?", and their parents, who were similarly indoctrinated and never educated, from lack of exposure to these ideas, simply replied, "Well, because God makes it rain." Without knowledge of the science of evaporation, pressure systems, almanacs and Doppler Radar being forecast to us throughout all modern children's lives, rainstorms would still be in our mind as this unusual, powerful, mysterious force, which comes in like The Wrath of God and devastates.