Final answer:
The phrase "O brave new world" comes from Shakespeare's The Tempest and reflects wonder and hopefulness. It differs from John Donne's lamentation of lost certainties or Alexander Pope's delight in new complexities.
Step-by-step explanation:
The phrase "O brave new world that has such people in it" is famously from William Shakespeare's play, The Tempest, not from the works of John Donne or any other poets mentioned. In The Tempest, the character Miranda exclaims these words being awed by the sight of people other than her father and Caliban for the first time, indicating a mix of wonderment and naïveté. Miranda's mood here is one of innocence and hopefulness, albeit tempered by her lack of experience with the world and its complexities. Similarly, poets like John Donne and Alexander Pope often grappled with the changing worldviews of their times, expressing a range of emotions from lament for lost certainties to delight in new complexities.
The sentiment expressed in "O brave new world" is different from the contemplative and often melancholic tones seen in John Donne's work. Donne, in his poem "An Anatomy of the World," reflects on the loss of the perceived stability and certainties of the earlier ages. While Pope, in "An Essay on Man," embraces the partial understanding humans have of the world. Each poet reveals his unique reaction to the evolving world, revealing the changing moods of individuals confronted with the passage of time and new ideas.