In her house is Malvolio, the steward, who reproves her uncle, Sir Toby Belch, for rioting at night with trivial companions. The trivial companions forge a letter, which causes Malvolio to think that his mistress is in love with him. The thought makes his behaviour so strange that he is locked up as a madman.
Sir Toby Belch finds further solace for life in making his gull, Sir Andrew, challenge Cesario to a duel. The duel is made dangerous by the sudden appearance of Sebastian, who is mistaken for Cesario. He beats Sir Andrew and Sir Toby, and encounters the lady Olivia. Olivia woos him as she has wooed Cesario, but with better fortune.
They are married. The Duke marries Viola. Malvolio is released from prison. Sir Toby marries Maria, Olivia's waiting-woman. Sir Andrew is driven out like a plucked pigeon. Malvolio, unappeased by his release, vows to be revenged for the mock put upon him.
This is the happiest and one of the loveliest of all the Shakespearean plays. It is the best English comedy. The great mind that mixed a tragedy of intellect with a tragedy of stupidity, here mixes mirth with romantic beauty. The play is so mixed with beauty that one can see it played night after night, week after week, without weariness, even in a London theatre.
The play presents images of self-deception, or delusional sentimentality, by means of a romantic fable and a vigorous fable. It shows us three souls suffering from the kind of sickly vanity that feeds on day-dreams. Orsino is in an unreal mood of emotion. Love is an active passion. Orsino is in the clutch of its dangerous passive enemy called sentimentality. He lolls upon a couch to music when he ought to be carrying her glove to battle. Olivia is in an unreal mood of mourning for her brother. Grief is a destroying passion. Olivia makes it a form of self-indulgence, or one sweet the more to attract flies to her. Malvolio is in an unreal mood of self-importance. Long posing at the head of ceremony has given him the faith that ceremony, of which he is the head, is the whole of life. This faith deludes him into a life of day-dreams, common enough among inactive clever people, but dangerous to the indulger, as all things are that distort the mental vision. At the point at which the play begins the day-dream has brought him to the pitch of blindness necessary for effective impact on the wall.
The only cure for the sickly in the mind is reality. Something real has to be felt or experienced. Life that is over-delicate and remote through something unbalanced in the mind is not life but decay. The knife, the bludgeon, the practical joke, and the many-weaponed figure of Sorrow are life's remedies for those who fail to live. We are the earth's children; we have no business in limbo. Living in limbo is like living in the smoke from a crater: highly picturesque, but too near death for safety.
Orsino is cured of sentiment by the sight of Sebastian making love like a man. He rouses to do the like by Viola. Olivia is piqued out of sentiment by coming to know some one who despises her. She falls in love with that person. Malvolio is mocked out of sentiment by the knowledge that other minds have seen his mind. He has not the happiness to be rewarded with love at the end of the play; but he has the alternative of hate, which is as active a passion and as real. All three are roused to activity by the coming of something real into their lives; and all three, in coming to the active state, cease to be interesting and beautiful and pathetic.
Shakespeare's abundant power created beings who look before and after, even while they keep vigorous a passionate present. It is difficult to praise that power. Even those who know how difficult art is find it hard to praise perfect art. Art is not to be praised or blamed, but understood. This play will stand as an example of perfect art till a greater than Shakespeare set a better example further on. It is
"All beauty and without a spot."
The scene of the roisterers, rousing the night-owl in a catch, rouses the heart, as all real creation does, with the thought that life is too wonderful to end. The next, most lovely scene, where the Duke and Viola talk of love that keeps life from ending, and so often brings life down into the dust, assures the heart that even if life ends for us it will go on in others.