He is famous as a countertenor singer.

His vulgar and thick voice echoed throughout the room.

We should always remember the power of Kannon in difficult times.

He thought he was smart, but he remembered the proverb 'a fool may give a wise man council', and understood the importance of listening to others' opinions.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.