Answer: Humans are called the crown of creation because the whole creation was created according to a structure that is called “Adam” – Man, and all parts of creation are components of this system.
When a person begins to comprehend creation, it appears within him as his constituent parts. A person begins to understand that only he was created and that all the rest of the still, vegetative, animate, and human are found within him.
That is the way every person feels who has achieved creation, even though according to our logic, it makes no sense for a person to feel that everything is within him. This is precisely what happens, because creation is a system of many connections, and within it, every person includes all of creation within himself.
From the Kabbalah Lesson in Russian 12/25/16