Consider the speech from Macbeth which compares life to acting. What references to theatre can you find?

The speech that Macbeth delivers upon hearing of Lady
Macbeth's death uses the image of the stage to help deliver its meaning.  For Macbeth,
the stage is a symbol of consciousness and being in the world.  It is an image that
Macbeth uses to describe how human beings live their lives.  Rather, than the use of the
stage as a glorious forum, where human beings display greatness and skill in entrancing
an audience, Macbeth sees life quite differently.  In the speech, the notion of the
"poor player" is one such element that conveys what he sees as the futility and
uselessness of life.  In this image, the "poor player" is simply put, a bad actor.  This
is seen in the exaggerations of bad acting, where one "struts and frets his hour upon
the stage."  This bad actor does not have a script, director, or assistant to guide him,
and to a large extent, this is why his acting is so bad.  What makes matters even worse
is that Macbeth suggests that one the "poor player" leaves the stage, it is as if he
never existed. The bad actor is never remembered, as bad acting is linked to futility
and a sense of uselessness.  Another theatrical image that Macbeth employs is the
closing one of the speech.  The idea of how life is a "tale told by an idiot" is one
where the actor is reading a tale, and has been reduced to an idiot.  Like the "poor
player," this actor is one who reads the tale "full of sound and fury."  Yet, this
intensity in delivery is undercut by the reality of how there is no significance to what
is done, as it "signifies nothing." In both acting based images, Macbeth is able to
bring out the futility of being in the world, something from which he speaks from a
philosophical and a personal point of view.