I think that the “Toby’s Spring” lecture covers the essential content for developers to understand and utilize Spring, from the fundamental principles of the Spring framework to practical applications. In addition, it goes beyond simply using Spring’s functions to explain the framework’s design intent and philosophy, which made it feel more special than other lectures. In particular, it explains difficult concepts through everyday and practical examples, so even if you hear something for the first time, you can understand it naturally as if you were already familiar with it. The biggest advantage I felt while listening to the lecture was that I was able to deeply understand the operating principles and philosophy of Spring. It doesn’t stop at simply explaining each function and API of Spring, but also thoroughly explains why it has this structure and principles, and what philosophy Spring was designed based on. This allowed me to gain a deeper understanding of design and architecture, rather than simply using Spring as a development tool. The practical examples are also very practical, so the fact that you can immediately apply what you learned in the lecture to your work is also a big advantage of this lecture. Since it focuses on examples that you often encounter in the field, it was easy to understand how to apply what you learned. Lastly, by taking this course, my understanding of the Spring Framework has definitely increased and I have gained the confidence to apply it in my work. This course is highly recommended to all developers who frequently use Spring in their work or who want to understand it more deeply in the future.