The Gestalt Principles - Basics for Beginners

I was reading 101 Things I Learned in Architecture School by Matthew Frederick. When I reached Chapter 4, which talks about implied forms I found the concept a bit difficult to fully understand. The chapter explains that some forms or spaces are not explicitly defined, yet we can still perceive them even though we cannot physically see them.
I wanted to learn more so I searched online and found this course. It was incredibly helpful and interesting I really enjoyed every lecture.
The course explained the concepts behind the chapter headings in a clear and engaging way, making them much easier to understand.
Thank you for making such an informative and enjoyable course.