Emotion
Any expression of emotion: sadness, joy, anger, grief, ecstasy, hate, exaltation, depression, and so on, all subjective and spontaneous. The key is to experience and subsequently to learn to control and direct them as desired.
In the Earth Life System there is no emotion beyond survival responses such as protection of young—responses which are purely aggressive or defensive in motivation. The nearest simulations include possessiveness, dominance, jealousy, pride, etc.