The irony reaches its most powerful exercise in the second scene of the third act, where Hamlet avails himself of the arrival of play-actors to test the King with his mouse-trap of an interlude. The Athenian mechanics played Pyramus and Thisbe with the simple intention of contributing their duty and homage to the nuptials. We see the humor of its juxtaposition with courtly scenes and weddings. But Hamlet, in his interlude, pretends amusement and mimics a murder to conceal his knowledge of the real one. "No, no, they do but jest, poison in jest; no offence in the world." His light talk with Ophelia is nothing but the audacity of excitement and expectation. His baffling of Guildenstern with the pipe; his making Polonius see a camel, a weasel, and a whale in a cloud,--covers the dreadful necessity which drives him, in the witching time of night, to that upbraiding of a mother, and that second meeting with a dead father, which will make men's breath bate and their veins creep while English is spoken in this world.
What other mood than Irony could a soul with such a secret for its guest spread for entertainment? Too strongly built and level to be cracked with the earthquake of madness; too awfully overclouded to sparkle with imaginings of wit; too daunted and saddened with the thought of a dear father in purgatorial flames to break into the geniality of Humor,--all his mirth lost of late, there is no resource, no method of relief to the mind that is strained to live with dissemblers and swear vengeance to a ghost, but to dissemble too with an irony as ruthless and sweeping as the crime. He saves his wits which might otherwise justify suspicion and go all distraught, by unconsciously assuming that love, marriage, chastity, all honorable things, and friendship too, are crazes, and he that banters them alone is sane.
But when he knows that the grave, near which he stood and satirized the careers which men pursue, was another piece of irony, since Nature by keeping Ophelia alive and beautiful really meant death by her, it destroys his own tendency to be ironical, and he breaks forth with an intense sincerity; then we take the point of his previous behavior.
"I loved Ophelia: forty thousand brothers Could not, with all their quantity of love, Make up my sum."