He started to act immediately.

I couldn't understand his actions.

He concluded that the problem was unsolvable.

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

His actions were intentional.

It's difficult to guess his feelings.

She is my favorite member.

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.

He is an expert in ethology, and his research is highly regarded worldwide.