I am very fluent at clinging on to emotions, both good and bad. I am definitely learning not to do so, slowly, but it's been harder than when I quit smoking cigarettes after 10 years straight.
"Emotion is energy in motion," holy shit, I just had that same epiphany not too long ago! I've also noticed over the years that supernatural abilities can be harnessed through extreme bouts of emotion (like frail mothers picking up cars off of their babies or old men setting piles of paper on fire using nothing but their hands). It's also interesting to note that with most versions of witchcraft (no matter if white, black, etc.) emotion and intent are synonymous in rituals.