He proposed a new theory about quantum mechanics.

Thanks to his serendipity, we were able to find a new business opportunity.

I use plain flour to make bread.

He said, 'It's difficult to make a life,' explaining the phrase 'When a man steps over the threshold, he has seven enemies.'

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 faced difficulties with the spirit of 'one eye, two feet, three gallbladders, four strengths'.