Gbeatty is quite right, in my opinion! Here are two quotes that you've request to support our contention:
In 1.1.86-90, Hamlet is lamenting the fate of his dear and good father, the former king. He is also cursing his uncle, Claudius, who has wrongly assumed the throne by murdering King Hamlet, and the betrayal of his mother, Gertrude. He cries out:
O horrible, O horrible, most horrible!
If thou hast nature in thee, bear it not.
Let not the royal bed of Denmak be
A couch for luxury and damned incest.
In the second line, he is challenging himself to act. The last, referring to incest, is in regard to his mother sleeping with her husband's brother. Tragic for the young man, indeed.
Another example of supreme tragedy is the fate of Ophelia, who has lost her father at the hand of her lover, Hamlet. In 4.7.210-212, her body is discovered by Gertrude. Laretes reflects on the tragedy, saying: Too much of water hast thou, poor Ophelia." He means that life became too much for her. The water literally took her life, but the psychological pressure is really what did her in.