This famous saying comes from Shakespeare's play As You Like It, and it's spoken by Jacques. What he's saying here is that simply going about our daily lives is a type of performance. Just like actors on a stage, we all have roles to perform: Daughter.
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coined by William Shakespeare. ... He says, “All the world's a stage,/ And all the men and women merely players.” The meaning of this phrase is that this world is like a stage show, and all human beings are merely actors.