How is the existentialist thought expessed in Hamlet?

I think that there is much in way of existentialism in
that there are no answers.  Hamlet struggles with what to do.  He might seek an answer
from above, or some type of condition that will alleviate him from having to choose and
embrace a path of action.  However, the reality is that there is "no exit" from his need
to have to choose.  In this, further existentialist tendencies are revealed in
Shakespeare's depiction of freedom and choice as elements that do not liberate human
beings from pain but actually enhance them.  Hamlet's reticence towards action and his
continual rumination that makes action almost impossible reflects the agony that
existentialists saw plaguing humanity.  Freedom is the source of pain, and to act upon
it without any sense of guidance is a condition that haunts individuals like a bad
shadow.  This pain is part of the human predicament and part of Hamlet's condition in
the world.  Finally, Hamlet has to bear responsibility for the pain he caused to
individuals in the drama.  Most notably of these would be Ophelia.  In this light, the
play embodies an existentialist idea that individual human action has consequences and
these have to be borne by individuals.  The culpability for the results of human freedom
is inescapable.  Hamlet might wish to transcend them, but an existentialist would see
this as impossible.  Ophelia's pain and suffering are realities that Hamlet must embrace
as a result of his freedom and actions towards her.