Hamlet feels a deep personal connection to the events unfolding in his life, including the death of his father and his mother's hasty remarriage to his uncle Claudius. He grapples with the complexity of his emotions and finds it difficult to outwardly express his feelings.
In contrast, Hamlet sees the actor as someone who can easily assume different roles and emotions, effortlessly shifting from sorrow to joy and expressing them with great passion. He believes the actor is able to access these emotions because they are not genuine to him, but rather are part of his craft and performance.
As the play progresses, however, Hamlet's perspective on acting and his own life begin to change. He realizes the power of theater and performance as a means of expressing truth and conveying emotions. He famously advises the actors performing "The Murder of Gonzago" to "speak the speech trippingly on the tongue," acknowledging the importance of both authenticity and skill in acting.
Ultimately, Hamlet's journey involves exploring the interplay between reality, performance, and the expression of emotions, leading to a deeper understanding of himself and the world around him.