That's going to be an interview that will come back to haunt, Tissier, I'm afraid. A lot of people are beginning to box in what the meaning of "ki" is and understand, for instance, the what's and how's of the "ki tests" by Tohei, some of the demo's by Ueshiba and others, and it all begins to hang in (despite the disparate demonstrations) as a pretty cohesive family of skills. And it becomes more and more obvious as knowledge and practice increase. Can someone do waza very efficiently without understanding what the ki stuff is talking about? Sure, that's obvious, too. But no writing by Ueshiba K., Tohei, etc., toss it off as some intangible and metaphysical phenomenon as Tissier just did. So now everyone knows the earliest possible date that Tissier could *begin* to study the ki in Aikido. Fascinating.