I will add here Yannis that recently I was talking to someone who says that O'Sensei said Aikido is 50%
Bun and 50% Bu.
Now Bu he describes as universal love and Bun as education.
Within Bun he says O'Sensei divided such into four parts.
Ki Iku,( education of Ki)
Tai iku,(education of body)
Toku Iku,(development of spiritual charisma) (which I in turn would rather call development of non-resistive presence)
Chi iku, (development of wisdom)
Now whether that's true or not it all fits by my reckoning.