I fairly agree with this. I still wonder how the author visualizes irrational numbers, exponential functions, etc. and more importantly, proves some (even simpl

I fairly agree with this. I still wonder how the author visualizes irrational numbers, exponential functions, etc. and more importantly, proves some (even simple) theorems with this kind of visualization. I have a similar impression when reading posts elsewhere about categorical structures in programming: they are repetitive and mostly trivial (actually, the category theory without context is trivial).