1 rich Libsyn https://www.libsyn.com 90 600 A while back, I listened to an interview with Bruce Lee*. There were two things that I took away from it, neither of which I understood at the time: Bruce Lee's insistence that martial arts are first and foremost about self-expression; and the concept of &quot;acting un-acting&quot; or &quot;un-acting acting&quot; (elsewhere I have heard him talk about &quot;fighting un-fighting&quot;). Recently I was reminded of this interview, but this time it made sense to me, because of what I had learned in the meantime about the nature of learning. Perhaps surprisingly, another look at what he had said got me to think of A Mathematician's Lament, an article by Paul Lockhart about maths education that had I previously covered on the podcast. I feel as though, armed with my new insights, I have a feeling as to what Paul Lockhart may have gotten wrong in his controversial piece. Overall, then, I am able to extract some ideas from what Bruce Lee says in a rather more coded or mysterious way, and generalise them so that they can apply to any field, while showing how they apply to maths in particular. Enjoy the episode. &amp;nbsp; *Full interview available at https://www.youtube.com/watch?v=5jfQSCbkA940, entitled &quot;Bruce Lee Interview HQ&quot;. Education Bookcast http://educationbookcast.libsyn.com/podcast <iframe title="Libsyn Player" style="border: none" src="//html5-player.libsyn.com/embed/episode/id/6481831/height/90/theme/custom/thumbnail/yes/direction/forward/render-playlist/no/custom-color/88AA3C/" height="90" width="600" scrolling="no" allowfullscreen webkitallowfullscreen mozallowfullscreen oallowfullscreen msallowfullscreen></iframe> https://assets.libsyn.com/secure/item/6481831