Starlock
Personally, I find it very presumptuous to think that there is NOT something at work that we can't see. Humanity would have to be terribly full of itself to think it is equipped with the senses to detect everything out there, because our senses are very limited. We can only see, touch, taste, hear, and smell; and far worse than other animals at that. We're prisoners of our own senses in terms of what we perceive as reality. It's likely that other aspects of reality exist that we cannot detect with our senses. The soul might be one of them.
I would agree that it would be presumptuous to assume that the world is limited by our current knowledge.
By this logic, I believe that there are many things out there that are simply in another realm of science other than the ones that we are currently aquainted with.
I would disagree, however, that our senses are limited to the aforementioned five.
Along those lines, I think that it is also wrong to assume that all actions of a person are determined by electrical impulses.
If it were so simple, then we would not be limited to "theories" pertaining to the inner working of sight and smell.
If we cannot hope to define what makes something like sight and smell work, then how can we possibly hope to define emotions and feelings?
As well, if emotions were as simple as nueronic impulses, then where do these impulses originate?
Also, consider that the impulses may be the effect of a given emotion, and not cause.
I have a problem with trying to define the inner working of humans or animals with pure, mechanical science.
Perhaps there is a definite mechanic to it -- however, I do not believe that we know what these mechanics are.
Firstly, I consider it a bit naive to hold the notion that our current scientific knowledge can come close to defining the working of the human mind.
Secondly, I think that it is perhaps a childish or simplistic line of thought to attempt to fit the definition of something so complex into a knowledge base so plainly limited.
(It's similar to this: someone cannot fit the idea of infinity in their mind, and instead attempts to rationalize that thought by saying "infinity must have SOME sort of end" -- they are also in denial that true infinity could even exist, on the grounds that if they cannot comprehend it, then it must not be possible.)
On the subject of the topic:
I think that emotions are most likely a mental/spiritual state, and that the body is affected accordingly.
-Alezunde