I couldn't understand his actions.

He started to act immediately.

His opinion had a big influence on my decision.

That news greatly influenced his opinion.

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

His words had a great influence.

That decision had a bad effect on our project.

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

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.