Answer:
These lines are spoken by Ophelia about Hamlet and his "supposed" madness/ insanity.
Step-by-step explanation:
William Shakespeare's "Hamlet" revolves around the revenge plot of the young prince Hamlet for the death of his father, the senior Hamlet who was the king. The play deals with the themes of good and evil, honor, religion, and loyalty.
The given quote is from Act III scene i of the play, where Ophelia comments on the condition of Hamlet who had 'supposedly' become insane or mad. These lines reveal her anguish at seeing how different Hamlet has become, for she had known him before his insanity and also have to observe/ see his current condition.