Excerpt from "Interview with Koichi Tohei (2)" by Stan Pranin, at http://www.aikidojournal.com/article?articleID=127
Eventually I also met Tempu Nakamura Sensei, from whom I first heard the words, “The mind moves the body.” Hearing this I thought, “That’s it! That’s all there is to it! It’s so simple!” I started looking more closely for that kind of thing and indeed discovered that Ueshiba Sensei would move his opponents’ bodies by leading their minds (kokoro). And he did it while completely relaxed. It would have been good if he had simply taught us that, but he never did.