These last few years I have found that I am following the immersion method. I have been studying, academically, the culture, customs and beliefs that relate to martial arts. I have found many answers and firmly believe, as shown by the quotes of Matsumoto Sensei, that this type of immersion without obsession is the true way to achieve mastery of any discipline.
The example I found is the one when I read Mr. DeMente's book about Samurai Strategies as they come from the study of Miyamoto Musashi's terse tome the book of five rings. I feel elation when I discover such things that create connections and explanations as to what I do, why I do them and why I continue after such a long time.
DeMente, Boye LaFayette. "Samurai Strategies: 42 Martial Secrets from Musashi's Book of Five Rings." Tuttle Publishing. Vermont. 2008.