If you can’t explain it simply, you don’t understand it well enough.
I just spent the last two days deep in the woods, a few hours north of Montreal, at Bitnorth - a small little get-together organized by a friend of mine, Alistair Croll. On a cold rainy September day on a lake in remote Quebec, our group of about 40 people gave short presentations to each other on our favorite topics - ranging from demonstrating how to make cement, to kitchen knife design, to satellite mission optimization.
Halfway through Saturday, during a break when discussing the presentations over early afternoon beers, one of the other participants reminded me about this great quote from Albert Einstein. No matter how complex the topic, this is absolutely true. It applies to physics, philosophy, politics, and even a startup pitch contained within in a 60-second elevator ride. It’s one of my favorite quotes of all time.