What happens
The Princess of France arrives at Navarre with her ladies and attendants. Boyet briefs her on the King's vow of isolation and suggests she request a private meeting to discuss Aquitaine's surrender. Ferdinand greets the Princess formally but must refuse her entry to the court due to his oath. The two groups exchange witty banter, with Biron and Rosaline trading sharp remarks. Ferdinand and the Princess debate the validity of his vow, establishing the central tension between duty and desire.
Why it matters
This scene plants the seeds of the play's central conflict: the collision between sworn principle and human desire. The King's academy oath, announced grandly in Act 1, meets immediate resistance from practical reality. Ferdinand's insistence that he cannot break his word—even to welcome a princess on diplomatic business—shows the rigidity of masculine logic, while the Princess's response ('sin to break it... but sin to keep it') exposes the absurdity of the vow itself. The court's formal language masks underlying attraction; every exchange bristles with sexual possibility, particularly between Biron and Rosaline, whose verbal sparring is already charged with mutual recognition.
The scene introduces the women not as passive objects but as intelligent agents who can see through pretense. Rosaline is sharp enough to catch Biron's contradiction immediately, and the Princess handles Ferdinand with diplomatic skill, turning his own logic against him. Boyet's observation that the King is 'infected' with love—despite the oath being mere hours old—suggests that the men's resolve is already cracking. The women's awareness of this weakness prepares us for Act 4, when the ladies will orchestrate their revenge by switching tokens. Shakespeare uses wit as a measure of character here: those who speak most cleverly are those who see most clearly, and the women's verbal superiority signals their eventual triumph.