If you ask what has made the Homo sapiens species so successful, one possible answer is that humans have succeeded in creating a fictional version of the real world with its trees and mountains and then making this imaginary sphere more important than reality. Examples of such fictions are states, human rights, money, companies and many other things that only exist in our minds.
Of course there are coins, but most money can only be found as a number in some book or other, and how this is used to create an economy requires a lot of theory - a theory of money - and many other fictions. And an anatomist who dissects a human being will not find any rights in his body. If you ask yourself what makes the science of physics so successful, you will get a similar answer. In the 20th century, it has succeeded in supplementing the classical equations with real quantities - force equals mass times acceleration - with equations with fictitious - imaginary - quantities.
This refers, for example, to quantum mechanics, which can only calculate the position and momentum of an electron with the help of an imaginary unit that appears as i in the textbooks. This number does not exist in the reality of real or real numbers - just as human rights or companies do not exist in the world of real everyday life. They only exist as fictions, but almost all people believe in them. The success of Homo sapiens is due to a duplication of reality. The success of physics is due to a second number dimension, whereby the imaginary unit in the numerical plane can form a ring by repeatedly multiplying i by itself, which allows an inside to be distinguished from an outside through its closed form.
The duality of the world is revealed in the contrasting interplay of inside and outside, and as concretely as physics makes itself felt in everyday life through its technical applications, it only becomes successful through a fictitious quantity. If someone now wants to know whether there is a role model for this doubling, they can be told that this insight belongs to the Romantic era. Its proponents knew that people need two pairs of eyes to get to the bottom of things. With the eyes in their head, they only see the surface. With the eyes in their hearts, the other reality opens up to them, with the help of which recognition begins.
