[wfo]

It strikes me as kind of silly the way he tries to separate the mathematics (i.e. what he calls simple calculations) from the physical intuition; all mathematics beyond say sophomore year in college is very intuitive but at an abstract level (and the earlier stuff too, they just teach the early calc/stats classes to scientists/engineers so they drop the intuition and make it about pure mindless calculation), mathematicians are primarily intuitive creatures who have just developed intuition over years of hard work about abstract objects which are far more difficult to intuit about than, say, a table.