The young lawyer in The Hack Driver learns wisdom by all three methods mentioned by Confucius.
Firstly, the young lawyer reflects on his life and the choices he has made that have led him to his current situation. He realizes that he has been living a superficial life and has been consumed by his ambition to become successful. This reflection leads him to realize the importance of honesty and integrity in life.
Secondly, the young lawyer imitates the behavior of the hack driver. He observes the hack driver's honesty, simplicity, and contentment with his life, and he tries to emulate these qualities. He realizes that material success is not the only measure of a person's worth and that there is much more to life than the pursuit of money and power.
Lastly, the young lawyer learns from his own bitter experience. He learns that his ambition and greed have led him astray and caused him to betray his own principles. He realizes that he has been selfish and has hurt others in his pursuit of success. This bitter experience teaches him the value of honesty and integrity, and he resolves to live a more meaningful life.
In conclusion, the young lawyer in The Hack Driver learns wisdom by reflection, imitation, and experience, just as Confucius said. He undergoes a transformation from a shallow and self-centered person to someone who values honesty, integrity, and contentment in life.