When a person finds himself in another country whose language he does not know, he has to overcome a number of difficulties - he can not read the necessary instructions, understand the inscriptions in public places and transport, and even the inscriptions on food packages. The person feels confused and helpless. This imaginary situation only to a small extent demonstrates what a person who cannot read feels.
Improvisation is an unprepared speech or a speech created in the process of speaking. But in order to learn to improvise, one must first master the skills of oratory. We can improvise only when we already know how to perform. An unprepared speech is a prepared failure. A person can improvise only when he knows the subject well. That is, improvisation is possible and good when it is prepared by previous experience and knowledge.
Our brain works on the principle of associations. He compares new information with previous experience. History has the same principle. This makes it easier for people to understand and memorize stories.