Hamlet considers that the skull could have been that of a lawyer, a courtier, or Yorick the court jester.
Seeing the skull in his hands, Hamlet is thoughtful, as it shows him how fragile, fleeting and ephemeral, and finite life is. He feels how inevitable death is and how no one can fight it. This intensifies when he discovers who the skull belonged to and how this person was part of his daily life.
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