Based on the introductory section of Chapter 47, how is the law of Karma and reincarnation explained?

Chapter 47 explains that the law of Karma is very deep, profound, and difficult for anyone to fully comprehend, noting that even the highly learned can be deceived by its complexities. The text states that one's actions directly determine their future, and upon death, a being attains a new birth that corresponds exactly to their deeds. This process is described as "As the action, so the hearing." The chapter further elaborates that births occur according to one's consciousness or wisdom, and foolish beings receive bodies precisely as they have earned. Therefore, the text emphasizes that a wise person is one who uses the priceless opportunity of a human birth to attain self-knowledge before the body perishes.