The Blossom of the Eight Emotions

Robert Plutchik created this wheel of emotions in 1980. Each of the eight spokes, or pedals, is an essential emotion, at its most intense near the center, and to lesser degrees, moving out. Opposites lie across the center from each other. The combination of any two, adjacent pedals generates the so-called advanced emotions, requiring some construction.
Consider the implications of the arrangement. Rage is the opposite of terror. Aggressiveness is a combination of interest and annoyance, and positioned between optimism and contempt.
Love, likewise, is that thing between optimism and submission. 

Nicely poetic, a symmetrical play structure for words.

Click on it, so you can get a closer look:

Thank you, Indexed, for a post that brought this to WhoDooWooWei's attention, and for developing an intriguing, original, expanded conceptual framework for the wheel.

Check it out, the emotion wheel was originally a flower bud shape, closed on both ends: