What contrast does Hamlet note between fortinbras and himself?

Hamlet notes the contrast between Fortinbras and himself in their respective actions and motivations. Fortinbras is depicted as a man of action who, unlike Hamlet, takes decisive steps to avenge the death of his father. Hamlet admires Fortinbras's ability to act swiftly and resolutely, even though his cause is considered insignificant compared to Hamlet's own quest for revenge against his uncle Claudius. He feels ashamed that he has been unable to act upon his duty to avenge his father's murder.

Hamlet also contrasts his melancholy and inaction with Fortinbras's energy and purpose. Fortinbras's troops are willing to risk their lives for a small strip of land, while Hamlet hesitates to act against his uncle despite the moral imperative to do so. This contrast highlights Hamlet's internal conflict and his struggle to reconcile his desire for justice with his moral qualms and uncertainties.