When I'm really disturbed by how something actually works, my approach is to try to implement something similar myself. Object oriented C (structs with function pointers) long ago gave me some insights including why Python has an explicit 'self' for everything. There's a similar exercise you can do in C to better understand the prototype chaining way of doing OOP. Have you tried to make a simple version of e.g. @Autowire that is still capable enough to let a Java app of many modules have one module only depend on an API module and not the implementation module with everything just working without explicit injection? Sounds interesting to me, I bet that would be more enlightening than a summary page, or at least make the summary page more understandable...