A person can go for years interacting only with the Jews who share his bubble, those who are in his close circle, in his place or in his group.
There may be arguments and disagreements among these people over minor matters, but on a fundamental level, these people all live in the same world.
When one goes outside, however, and meets people who have never spent time at the house of study of Shem and Ever, nor visited the home of Isaac and Rebecca, he finds a world that is completely foreign to him.
It is a world that does not understand the first thing about what motivates him in life – what he wants, what he aspires to, what guides him, and what agitates him.
–Rabbi Adin Steinsaltz