Shakespeare's tragic hero, Hamlet, and his sanity can arguably be discussed. Many portions of the play supports his loss of control in his actions, while other parts uphold his ability of dramatic art. The issue can be discussed both ways and altogether provide significant support to either theory. There are indications from Hamlet throughout the play of his mind's well being.
Hamlet's antic disposition may have caused him in certain times that he is in a roleplay.
Hamlet has mood swings as his mood changes abruptly throughout the play. Hamlet appears to act mad when he hears of his father's murder. At the time he speaks wild and whirling words:Why, right; you are I' the right; And so, without more circumstance at
all, I hold it fit that we shake hands and part_ [Act I, scene V, lines 127-134]. It seems as if there are two Hamlets in the play, one that is sensitive and an ideal prince, and the insane barbaric Hamlet who from an outburst of passion and rage slays Polonius ...