The world of Hamlet , for all the characters in the play, is a world of such signs, and they remain enigmatic. Claudius dies without revealing whether he realizes that Hamlet knows about the exact circumstances of his crime. Nor does his guilt ever 'unkennel itself in one speech' as Hamlet hoped it would. We do not know exactly how much Hamlet tells Horatio, or how much Horatio credits it. We do not know exactly how much Hamlet loved Ophelia, or why Ophelia calls Hamlet 'unkind' so early in the nunnery scene - before his unkindness has shown itself in the play.
Shapes are ambiguous and uncertain in Hamlet, perception is blurred.
We do not know. Our perception is mainly through the eyes of Hamlet, but we cannot be sure that those eyes themselves are clear because we cannot know Hamlet himself. Stand and unfold yourself. But Hamlet's self is never unfolded. If these things are there in the play they are the fitting discoveries of an age which has felt acutely the ambiguities of temporal and spiritual authority, the relativities of perception, and the problems of identity.