I am a student who wants to be a backend developer. I started studying Spring with another book at first. Of course, that book also had detailed explanations, but I think I accepted it as a way to utilize it rather than understand the principles. That is why I often did not know what kind of code I was writing while using it. The more I listen to Younghan's lectures, the more I think, "Oh, I am more ignorant than I thought," but I feel the need for the basics before it is too late, and it seems to be an opportunity to solidify it. I am always grateful for the great lectures and I will run through the lectures you give me!