EMOTION, n. A prostrating disease caused by a determination of the heart to the head. It is sometimes accompanied by a copious discharge of hydrated chloride of sodium from the eyes.

An emotion is our evolved biology predicting the future impact of a current event.

In modern settings, it's usually exaggerated or wrong.

Emotion, which is called a passivity of the soul, is a confused idea, whereby the mind affirms concerning its body, or any part thereof, a force for existence (existendi vis) greater or less than before, and by the presence of which the mind is determined to think of one thing rather than another.

Emotions are our victory or defeat indicators, the faces of our wants or fears, connected to an established or pursued after sense of self.

meaning equals emotion, and emotion equals life.

Developing on another level, emotion is nonetheless, between automatism and objective action, a moment of psychic evolution. It forms the link between movement, which pre-exists, and consciousness, which it inaugurates. Incentives currently without outcome develop an erethism, the accumulated charge of which must explode, even if by transforming itself.

Lo, what a powerful thing is emotion! Men may die of imagination, so profoundly can a notion afflict the mind.

Once a transition of value creates an emotion, feeling comes into play. Although they're often mistaken for each other, feeling is not emotion. Emotion is a short-term experience that peaks and burns rapidly. Feeling is a long-term, pervasive, sentient background that colors whole days, weeks, even years of our lives. Indeed, a specific feeling often dominates a personality. Each of the core emotions in life - pleasure and pain - has many variations. So which particular negative or positive emotion will we experience? The answer is found in the feeling that surrounds it. For, like adding pigment to a pencil sketch or an orchestra to a melody, feeling makes emotion specific.

Remember, emotions themselves are neither good nor bad. They are simply our psychological responses to the events of life.

Emotions interpret the world for us. They have a signal function, telling us about our internal states as they are affected by input from the outside. Emotions are responses to present stimuli as filtered through the memory of past experience, and they anticipate the future based on our perception of the past.

Physical well-being depends on more than keeping our bodies fit. Emotions and the people who come into our lives matter just as much... “‘I never get angry,’ says a character in one of Woody Allen’s movies. ‘I grow a tumor instead.’ Much more scientific truth is captured in that droll remark than many doctors would recognize. Mainstream medical practice largely ignores the role of emotions in the physiological functioning of the human organism. Yet the scientific evidence abundantly shows that people’s lifetime emotional experiences profoundly influence health and illness.

Affection: Tout ce qui, dans nos pensées, dans nos projets, dans nos résolutions est marqué d'un degré quelconque d'amour ou de haine, de joie ou de tristesse.

Emotions interpret the world for us. They have a signal function, telling us about our internal states as they are affected by input from the outside. Emotions are responses to present stimuli as filtered through the memory of past experience, and they anticipate the future based on our perception of the past. (p206)

Emotion arise from Desire, hence an Illusion.