Sometime ago (last year), I happened to watch a clip with a shattering metaphor. I was stunned as the visual deeply disturbed me. In the clip, the narrator compared Einstein's trail (special relativity) to ascending a mountain from the steeper pathway. Einstein did reach the summit! but in a very hardknock rumination. The others who learnt of the discovery of Einstein scrambled to explore variant routes to claim the arduous summit, far easier approaches. A learner can reach the very summit from a gas balloon or a gentler slope. The narrator further introduces the basic principles of relativity in a never-before-heard manner. I was greatly impressed! (relativity could be explained like this also with an ingenious worldline toy) The metaphor lingered on me. The reproducible work of the original discovery undertaken by a thinker is not always the most accessible path. But once the thinker shouts out: 'hey I found the top of the mountain ', others could map their own expeditions to the resolved coordinates, and in that process, each stumbles on a more congenial path. We find a lot of mathematical and science topics puzzling, and daunting, because we are taught in the original (steepest) path of the victorious thinkers. The academic textbooks mindlessly copy the original path in good faith. I am amazed by citizen tutors like Burkard Polster and Grant Sanderson and Henry Reich and Matthew John O'Dowd hosting science learning from gas balloons and ramps. Why am I writing this today? Yesterday, I read ... the book dedicates only a measly chapter to that equation but the hundred odd pages to the build up of that pointy chapter is mind-blowing. I have never seen anyone explain that fabled equation deploying just the first principles of momentum conservation extrapolated into interchangeable dimension (spacetime). Generally, that equation is also derivative in the quantum hustle (clumped energy is mass). A lot of science topics had been bewildering to me in the past. These days when I meddle in science learning as a pastime, I tend to be mindful of that mountain metaphor. If I am unable to grasp the talk in the nearest text, it could be because I am clambering the mountain through the harshness of the outdated trail. Recognizing the drawback, I search for other narratives. PS: I highly recommend this book to anyone with even a smidgen of interest in the methodology to appeal and explain scientific insights in fellowship as a teacher, parent, or even a threatening aunt to her nephew. Again, it is not so much the equation but the process of demystifying a monumental trek in science with balloons and ramps without being overly simplistic or unimaginatively reductive to smarten up the hooked learner sensitive to the mountain metaphor.