L'Engle's biography also shines through here in the form of the author's use of classical music. L'Engle's mother was a gifted pianist and taught her daughter a fondness for music; L'Engle grew up hearing her mother and other musicians practicing and performing. Many of the characters in her novels are passionate about music, and in this chapter, Mrs. Whatsit speaks in "a rich voice with the warmth of a woodwind, the clarity of a trumpet, the mystery of an English horn." In addition, the Biblical verses she quotes are about "singing a new song unto the Lord." Thus this chapter blends L'Engle's Christian orientation and her love of classical music.