They being penitent,The sole drift of my purpose doth extendNot a frown further. Go, release them, Ariel.My charms I’ll break, their senses I’ll restore,And they shall be themselves. (Act 5 scene 1, 36-40)
I’ll fetch them, sir.(Act 5, scene 1, 41)
This airy charm is for, I’ll break my staff,Bury it certain fathoms in the earth,And deeper than did ever plummet soundI’ll drown my book.(Act 5, scene 1, 63,66)
In the previous Act, Ariel imprisoned Alonzo, Antonio, Sebastian and Gonzalo under the trees where Alonzo, Antonio, and Sebastian became mad because Ariel revealed their past sins against Prospero. Ariel feels sympathetic when he sees Alonzo and his companions being mentally tortured by Prospero's magic. Prospero, rhetorically, tells Ariel that he feels the same sympathy as they are ones of his kind, and asks Ariel to release them and bring them to him.
Once Prospero has achieved his goal to make those sinners repent and redeem, he gives up his magic by breaking his staff and drowning his book.
I'm free
Prospero praises Gonzalo for his loyalty and condemns others for their treachery. He asks Ariel to awake and lead the boatswain and mariners here as well. Prospero generously forgives Antonio but demands him to return his dukedom.
Applause to forgive me!
Surprisingly, Alonzo found that his son Ferdinand survived from the shipwreck and is playing chess with Miranda. The occurrence of other humans surprises and impresses Miranda as she has been living on the island not seeing other humans for a considerable period of time. Alonzo recognizes Miranda, the girl Ferdinand met on the island, became Ferdinand's wife. He asks for forgiveness in his delight.
The three dunk men, who aimed to assassinate Prospero but failed, are demanded to return their stolen clothes and clean up the cells. Prospero invites Alonzo and his companions to stay over and promises that he will take them on a ship back to Naples the next morning where they will hold their children's wedding. Prospero then gives Ariel freedom but asks him to keep their way home safe.
Prospero says his epilogue in the end of the play. He has lost his magical power but imprisoned on the stage. He asks the audience for applauses as a forgiveness to set him free since he has pardoned the deceivers. As the Tempest is the last play Shakespeare has ever written, the epilogue can be regarded as Shakespeare's farewell to his loved audiences and stage.