In Hamlet the play is mainly about the trials and hardship faced by Prince Hamlet in his quest to avenge his father. Hamlet starts out as a mournful young man as he grieves for his father who recently died. When Hamlet finds out that his father was murdered by his brother Claudius he becomes first enraged then pessimistic about the world.
Love is a crucial key in the play Hamlet. The whole plot of revenge is based upon the love Hamlet had for his father and how the love was so strong it made him prepared to do something that was extremely difficult of him to do. Later in the play the love Laertes had for his father and sister drove him to seek revenge for their deaths. Even most of the sub-plots in the play were about love including the conventional love of Hamlet and Ophelia, the friendship 'love' between Horatio and Hamlet, the incestuous if not lust filled love between Claudius and Gertrude and the love between family members. All of which make up the essential and important parts of the play.
A known fact is revenge is more often than not driven by love. In this case Hamlet, because of the great love and admiration he had for his father, was compelled to do something he found extremely difficult to do. That is killing Claudius, which would therefore mean avenging his father and allowing his father's tortured soul to go to heaven. Although he may have procrastinated in doing his duty as a son he eventually gets the job done. In the play Hamlet thought very highly of his father. This can be seen in how he describes his father to his mother. "Look here upon this picture, and on this, counterfeit of presentment of two brothers. See what a grace was seated on this brow: Hyperion's curls, the front of Jove himself, An eye like Mars to threaten and command, A station like the herald Mercury. New light on a heaven-kissing hill: A combination and a form indeed. Where every god did seem to set his seal to ...