Emotion

An emotion is an autonomic impulse which induces positive or negative mental states. Most sentient species experience emotions, different species attribute different values to different emotions. The Vulcans suppress all emotion.

Some harmonic diamonds emit a low-level energy wave, stimulating areas of the brain associated with primitive emotions. (TNG comic: Captain's Pleasure)

Emotions

 * Anger
 * Envy
 * Greed