The chapter begins with a discussion of the time difference between the time it takes to get to the bus stop and the time at which it takes you to get there. It's not so much that the bus stops on time, but that people experience time differently when they're having bad days. Time goes by fast if you have fun, but if you nag bored, it feels like it's going to be forever. If you hang out with friends, the hours go by like summer. The chapter ends with an explanation of the concept of sensory time. Time is a measure of how long it will take you to reach a certain age. For example, if you reach the age of nineteen, you'll be forty days older than you were when you were nineteen. This means that if you live to be eighty, you will be thirty years older than someone who lives to be nineteen. So, if we assume that we live to age eighty, then we can say that we'll live thirty years longer than a person who lives twenty-one years old. If we assume the same thing, we can also say that if we live twenty-five years, we will be forty years older. The time difference is even more significant when you consider that one year is equivalent to 1/18 of a person's life. So if we take the example of a nineteen-year-old person, we'd say that he or she will reach a plateau when they are nineteen years old