Emotional Intelligence - is the capability of individuals to recognize their own, and other people's emotions, to discern between different feelings and label them appropriately, to use emotional information to guide thinking and behavior, and to manage and/or adjust emotions to adapt environments or achieve one's goal(s).
How do emotions originate?
Perhaps not surprisingly...from both internally and externally. Emotions arise in response to external happenings but the manner of the response is driven internally. Take lightning for example. When there is a thunderstorm happening, one person may be afraid of the lightning, while another may feel in awe of it, the power and energy. Both emotions have been originated in response to the lightning, but the type of emotions they felt came from within.
So, the bottom line is, no matter what's going on externally, you are still the source of the emotion you feel. And so, it is in yourself that you can find the resources to change it.