What is the central theme of the provided text and images regarding New-Fist's curriculum?

The main point discussed in these images is the establishment and entrenchment of New-Fist's practical curriculum. This curriculum, comprising fish-grabbing, horse-clubbing, and tiger-scaring, became the accepted "heart of real education" by teaching essential survival skills. The text further highlights how this traditional system was defended against conservative resistance by appealing to the idea that these subjects developed fundamental human qualities and were sanctioned by the "Great Mystery."