Is Sun Wu Kong fear of death originate from his lack of normal worries. When he and his kingdom discovers the waterfall caves they meet all the needs they previously worried about like food shelter, etc. They also separated themselves from the interaction of other animals like the birds. Is it due to a lack of these daily trials and tasks the bring Sun Wu Kong focus on the goal of immortality and later find himself a disciple to a man simply living day to day, a man surrounded by these worries.