If you're treated a certain way you become a certain kind of person. If certain things are described to you as being real they're real for you whether they're real or not.
“If you stand still in any city long enough, you see everyone pass you by. So you're in Chicago. If you stand on the corner of Belmont and Clark, and you do that for three years, you'll pretty much have seen everybody in Chicago pass that junction.”
“Seneca brings vividly before us a picture of the various scholars assembled in a school of the philosophers.”