Now, this is a very tricky question. And for all I know, there might not be a perfect answer to it. Emotions, by their very nature, do not follow fixed rules…..they just happen, based on what a person feels at a given moment of time. And likewise, there’re no fixed rules for capturing emotions, too. The same scene can evoke different emotions in different people, hence emotions are subject to personal bias. From my experience, my best pictures depicting emotion have ‘just happened’. I don’t remember meticulously planning for them. Does that mean the photographer has no role to play in this? Far from true. As far as I'm concerned, the one most important rule of capturing emotion is to first feel the emotion yourself. Then, you have to click at just the right moment. Now, both of these ‘rules’, if you think about it, aren’t really easy to put into practice. So let me pen down a few points which one can keep in mind while trying to frame emotions. Most of these, rather than ‘rules’, are merely indicators on the situations where one may come across emotions that can be captured. By no means is this list exhaustive, as the sea of emotions is too vast to be captured in a single Bright Hub article!