The older child. The one that still acts like a kid and questions things and makes things, Legos and apps, for no other reason but to flex the creative muscle.
The older adult. The one that follows a common program. They let their job define them. The accountant fears their creativity. The marketer fears the numbers. The CEO aggregates info and makes decisions but can’t execute the real work.
Everybody’s different. But everybody’s got the same plastic brain that either grows or is done changing, molding itself into definition.