The way the mind decodes music is an individual mystery. But the physical circumstances can change the way you listen.
The only reality of the theater exists in the mind of the audience.
Infinity is a way to describe the incomprehensible to the human mind. In a way it notates a mystery. That kind of mystery exists in relationships. A lifetime is not enough to know someone else. It provides a brief glimpse.
Ultimately, theatre takes place in the minds of the audience: they all imagine the same thing at the same time.
The only reality of the theater exists in the mind of the audience. That audience looks collectively at what is going on on the stage and collectively imagines that this is real.