The thing where you said Ki was "emotion" immediately got me thinking of Bruce Lee in Enter the Dragon where he teaches his student Lao.
the student attacks
"What was that? We need E-mo-tio-nal con-tent, kick me again"
the student attacks again, this time more fiercely
"I said emotional content, not anger"
I myself have never been a fan of Ki as a mystic force, but "emotional energy"? I can get behind.
My apologies if I did not make it clear that I was not the author but it was from a blog by a Mario McKenna.
I agree though that what is being described as Ki in eastern philosophy and martial arts is closer to emotional content than mystical, supernatural force.