What does the author think is the main difference between a punctual person and an unpunctual person?
A punctual person does everything at the right time while an unpunctual person seldom does anything at the correct time.
A punctual person has a lot of appointments while an unpunctual person has few appointments.
A punctual person has much time to do everything while an unpunctual person has little time to do anything.
A punctual person does everything ahead of time while an unpunctual person does everything behind schedule.