There was a time when people believed that the earth was flat. This idea dates back to the ancient Greece history. People thought that the surface was completely flat and when they've  the end , they would fall off. So this became an illusion that people believed in at some point in time. But  at the same time became a constant debate amongst a lot of people as well. At this time Columbus was being acknowledged for discovering America, Then came along debates on whether or not he knew if the world is indeed round or flat , which brought about the “The flat earth theory” . The Pythagorean also came up with their own theory  “the earth was round “. Ever since then scientist has been convinced and believed that the earth were indeed round. But then came  speculations that the earth was smaller than what it really appeared to be.  So this shows discovery of something new can bring about good and change, as well as doubts, lies and disbelief. Even though people are comfortable with what they believe in. When their is change brought about that makes good enough sense , they change their perspective. Basically its a mind control concept that dictates to you  on how your going to live your life and how you would like to live it . If these people were comfortable with believing that the earth was flat , they would have never been able to discover  the other continents and learn that its more there  than what they think.  The "mind" is a very powerful thing that creates a comfortable image that controls us  that we're not always aware of, some people know and refuse to accept the truth and live their "comfortable lie"We can be in control if we like we just  have to know the difference between reality and illusions and decide which one is better .