Everything is the universal set. It includes everything! Nothing is outside of it. It even contains the concept of nothingness, as vague and ambiguous as that might be. And each of us also has our own universe of experiences.
Physicists and philosophers have not yet found a “theory of everything” (one consistent theory that explains everthing) and many believe it will never be found.
Still, we all like coherence in our thoughts and beliefs. Some people have a “theory of everything,” a set of principles that they use to navigate life.
What does everything mean to you? Do you have a theory of everything? What does your universe contain? What might be outside of it? How would you know?
See also: Venn diagram, Black hole, Solar system.
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