This problem is very difficult.

Learning rhymes in Kanbun is difficult.

I am taking a class in Literary Chinese.

I like to study new languages.

I love the class of reading Chinese classics in Japanese.

I studied Classical Chinese in university.

He understands the meaning of the proverb 'Teaching is half learning', which means that teaching leads to one's own learning.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'