Meg, as in the previous chapter, is torn by all that she does not completely understand. Her first challenge in the novel is to learn to accept not knowing everything. For example, when she first meets Calvin, she immediately wants to make an opinion of him, but her mother asks her to be patient and says that in time she will come to know him better. Meg must realize that reality is not always as it seems, a lesson that applies to her father's disappearance, her brother's exceptional gifts and her own self-conception. At the end of the chapter, the theme is reinforced when Mrs. Which chooses to remain invisible, yet her presence is nonetheless certain. It is a challenge to Meg to learn to see things more clearly as they truly are beneath their often-deceptive surfaces. Thus, it is significant that so many of the important characters in the novel wear eyeglasses. Meg points out her father to Calvin as the man in the photo with the glasses. Calvin tells Meg that she has gorgeous eyes behind her glasses. Mrs. Who's thick spectacles are the first part of her to materialize in the moonlight. The theme of seeing clearly is reinforced later in the novel when Meg is about to alight on Camazotz with Calvin and her brother. Mrs. Who's parting gift to Meg will be a pair of glasses. Calvin, too, learns that things are not always as they seem. He is surprised to learn that Meg, although a few grades below him and generally considered a moron at school, can help him so much with his homework. Calvin asks Meg several questions about modern physics, and she answers all of them easily. Ironically, she misses the obvious question about the author of Boswell's Life of Johnson. Especially significant is the question about Einstein's equation for the equivalence of mass and energy, for it points to the ideas that influenced L'Engle while she wrote her book. As L'Engle read the latest works of Albert Einstein and Max Planck, she incorporated their ideas about relativity and quantum theory into the conception of time in Chapter Five. The overarching theme of the book, the power of love, pervades over the entire chapter. Calvin says that although his mother never seems to notice him, he nonetheless loves her dearly. Likewise, Mrs. Murry tells her daughter that she is "still very much in love" with her husband, even though he has been gone for so long. Calvin is deeply moved by the love he gets at the Murry's household. He says that the neighbors who invent stories about Mr. Murry's extramarital affairs do so because they "can't understand plain, ordinary love when they see it". Calvin and Meg's budding romance is also a testament to the power of love amidst adolescent awkwardness. We read that the moonlight shines on Meg's orthodontic braces and her glasses are stained with tears, yet she appears beautiful to Calvin's eyes.