I experienced various trials and errors while learning programming and getting a job as a non-major. I studied many Spring lectures and Toby's Spring to get a job as a Spring developer, but I regret that I could have reduced the trial and error if this lecture had been available in advance. ㅎㅎ It's such a great lecture! There are various Spring books and lectures on the market, but they make the explanations too difficult. On the other hand, through this lecture, I was able to learn about the history of Spring, past problems, how Spring solves those problems, and the concepts of IoC containers and DI through direct programming, which was great. The disappointing part was that I personally expected AOP and Proxy because they are the core principles of Spring, but the part about AOP was left out of this lecture, which was a bit disappointing. They said they would explain it in a future lecture, so I'm really looking forward to it. I highly recommend this to those who want to become Java and Spring developers. Thank you for creating such a great lecture.