A Cusco resident would be surprised at the “money” trade, boating in the middle of the capital, the enormous size of the city, cotton clothes, an abundance of handwritten books and human sacrifice, a Tenochtitlan resident would be surprised at the absence of corn and beans, unusual potato food, wool clothing, and calculations on knots instead of the usual writing. But especially the Aztec would be surprised at the abundance of large pack animals.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.