For example, in childhood, a person may play the role of a student, learning and developing their skills and knowledge. In adolescence, they may take on the role of a rebellious teenager, exploring their independence and identity. In adulthood, they may become a parent, spouse, or professional, taking on the responsibilities and challenges of those roles. And in old age, they may become a grandparent or retiree, reflecting on their life and experiences.
The quote "one man in his time plays many parts" suggests that a person's life is a journey of self-discovery and growth, and that as they progress through the different stages of life, they should embrace the challenges and opportunities that each stage brings.