Final answer:
The provided text does not mention what Sae Young decides to grow but focuses on the character Hong Gil-Dong, who aspires to become respected and feared by practicing soldierly arts and rejecting societal constraints. Hong Gil-Dong is recognized as a remarkable individual by Hong Pansa.
Step-by-step explanation:
The provided passage does not clearly state what Sae Young decides to grow, rather it discusses the character development and aspirations of Hong Gil-Dong.
Therefore, based on the provided excerpts, it is not possible to provide an answer about Sae Young's decision. Instead, we learn about Hong Gil-Dong, who experiences societal constraints due to his status but resolves to become a respected and feared individual irrespective of his upbringing.
His determination to change his destiny is illustrated by practicing the arts of the soldier late at night. The excerpt also includes a contemplative reflection from Hong Pansa, which implies that Hong Gil-Dong is a remarkable boy with great potential.