Emotion

Obviously emotions are something that great minds and thinkers have tried to understand and explain forever. I will make no attempts at explain emotion, and I guess I'm writing this in an attempt to understand it.
Apparently psychologists differentiate emotions and feelings, but I think for my purposes here they are the same. Love, Hate, Pride, Responsibility, Fear, Sorrow, Happiness, etc. There are so many emotions, some seem more complex then others, some easier to explain, yet we know they're all just caused by different chemicals in our brains. i.e. Fear, seems like an easy one, we're afraid of monsters, axe murders, spiders, etc, but it also gets more complex then that. Some people are scared of flying, some people are scared of elevators. Those can we can try to explain based on bad experiences those people had on a plane or in an elevator. But what about the people who are scared of open spaces? Or those who are afraid of being alone, or in the dark, afraid of bacteria, the list goes on, and on. What makes one person afraid of bacteria, but another afraid of an open field? I don't know. We could spend eternity trying to answer that, yet fear is only one of the many emotions we're here to understand. Hate and Responsibility, two emotions that seemingly different and disconnected, yet each emotion can be paired or connected with others. In the case of family feuds the hatred for the other side is directly connected to one's responsibility to ones family. This same connection can be seen in other (more ugly) areas in history that I'd rather not talk about. Love and Sorrow, another two emotions that seem to be opposite, but I don't even have to explain how they are often connected. I think the lesson here is that to understand emotions you have to understand them all as a group, not to dissect them and attempt to explain each individually.