This is the second edition of the appendices to the second part of the story “Memories of the Future”, Chapter 8 (Recommendations conveyed to Fyodor by Anna German for self-improvement) This work uses genuine statements by Bertrand Russell Have you ever encountered a situation where a seemingly intelligent person does not understand basic things ? Teachers who were indignant that their students did not understand something, angrily shouting “well, I explained everything”? People who do incredibly difficult things with ease? Why is it that what seems simple to one person is inaccessible to another? Why is it that a person who is well versed in something cannot appreciate how simple things for him are perceived by other less experienced people? Why is this happening? The reasons lie in our ability to perceive the world around us.