First Barrier: Absence of Mass
Lack of Mass (Physical Object) of What is Being Studied
If one is attempting to understand the function and operation of a car or a computer or a solar system, the printed page and spoken word are no substitute for the object itself.
It would be difficult to understand how to use a computer for the first time if you did not have the computer there in front of you. In fact, lacking the object associated with a word can inhibit all understanding.
If the mass of a subject is absent, you can actually feel squashed. It can make you feel bent, sort of spinny, sort of dead, or bored.
A person studying a subject without the objects related to that subject will experience these and several other specific reactions.
Knowing how to identify and handle these reactions is vital to a student’s ability to grasp and use a subject—and more than vital to a teacher’s ability to get a student to learn the subject.