He is writing a thesis on dialectical materialism.

It is important to distance yourself from antisocial forces.

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 achieved great success in his business, but as the proverb 'A thousand gold pieces' fur is not from one fox's armpit' suggests, it was not something he obtained overnight.

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He said, 'Man shall not live by bread alone,' teaching me that spiritual satisfaction is also important.