Classical Electrodynamics

Jackson's approach is very thorough, but I wonder what motivated the emphasis on detailed derivations and proofs. Did it stem from a pedagogical tradition or a personal teaching philosophy?

This book's depth is intimidating but also rewarding. I'm curious if readers felt it helped them grasp these complex topics better than more introductory books.

It's extremely dense and technical, so I'm wondering what strategies or supplementary resources others recommend for mastering its content.