I forgot my identification papers, so I couldn't open an account at the bank.

I had a hard time finding my birth certificate.

May I show you my proof of qualification?

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

I obtained the natural coat certificate for my dog.

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.