What theological principle regarding death and rebirth is discussed at the beginning of Chapter 31?

At the start of Chapter 31, a significant theological principle is presented: one's state of mind at the moment of death determines the state one attains in the next life. The text uses the analogy of a worm becoming a bumblebee through constant focus and fear. It posits that whatever one meditates upon at the time of death is the form one will attain. Therefore, the chapter strongly advocates for the practice of remembering God's name (Name remembrance) throughout life, so that one remains absorbed in God's feet at the very end and becomes free from the cycle of birth.