The questions Sophie receives in her mailbox compel her to seek answers and, naturally, she starts within. I say “naturally,” because the book is set in 1990, she’s 14 (almost 15), there’s no internet and she only has the questions (which are directing her inward). But, eventually, she understands the nature of her reality and taps into her own personal will and determination in order to, on a certain level, redefine her reality. In a similar fashion, the five internal observations which make up the second limb of the philosophy of yoga compel the yoga practitioner / philosopher to turn inward, take a look at themselves, and (in the process) take a look at the world and their part in defining it.