Answer: Spend as much time developing the mind as developing the body.
Explanation:
The author's main purpose is to convince readers to spend as much time developing the mind as developing the body.
According to the author, people usually look at their body and develop it more but leaves their mind undeveloped. The author stated that human beings employ different people in order to bribe their stomach into decent behaviour but on the other hand, ni attention is given to the mind and posited that both the body and mind are important.