Aiki (martial arts principle) and its practice is often kept within a particular individual or two from a family/school lineage. Culturally, and due to certain necessities of the time period, the aiki knowledge was usually a very well guarded secret and rarely disclosed. The oldest book to have historically discuss aiki was the 1899 Budo Hiketsu-Aiki no Jutsu. On the subject of aiki it was written: The Textbook of Jujutsu (Jujutsu Kyoju-sho Ryu no Maki) from 1913 wrote: Aiki (martial arts principle) Aiki from a Japanese budo term, at its most basic is a principle that allows a conditioned practitioner to negate or redirect
That Is All (song) style. He writes that a number of "characteristic" Harrison musical devices are found in "That Is All" – such as a melody that rises by a half step with each line, and an A minor chord sharpened to an augmented triad "to create drama". Author Ian Inglis describes the song's melody as "romantic". Referring to its status as the last track on "Living in the Material World", he also comments on the appropriateness of Harrison's opening words: ""That is all I want to say"". Inglis writes that Harrison goes on to state both "[what] he wants to do for his