hmmmn.....ive been thinkin bout this one and ive come up with a later note...
i think, speaking from experance, a writer cant effectivly convay an emotion unless he has experinced the emotion with close to that particular strenght. for instance i find when im reading some stories where writers are trying to convay deep seated depression with sucidal tendancies it just doesnt come off efectivly even though some of these writers are obovioulsly extremely skilled, they dont seem to convay the true power of some of these types of emotions because, if my view is correct, they dont really understand them. i find that the instances of these emotions seem to be steryotipical in nature and are genraly very off putting when being read by someone who has experinced those emotions in their full force. i also find that these desription may allow you to symptahise with the character they dont allow you to empathise with him.
.......just some thoughts.