I studied most of this book in the 1970's, returning to it now that I have the time to really savor the logic of calculus.
I have three reasons for this study:
1 - Intellectual pleasure,
2 - desire to find the transitions in my own mind from imagination to concept,
3 - desire to read Penrose's "Road to Reality" with better understanding than I bring to it now.
CAUTION: Does not go well with a glass of 🍷.
As I work my way through this book, more reflections to come.
In the study of functions, I discovered an innate bias: I am repelled by the idea of a function as ordered pairs. It took me several weeks of work to grasp this. I was rooted in the classic physcist"s mindset of continuous curves found in the orbits of the planet's. The next hundred pages cover the implications this definition!