cleanliness is next to godliness idiom saying
清洁近乎圣洁（用来形容卫生的重要性）
used to say that it is important and morally right to keep your body or home clean
She was very houseproud and believed that cleanliness is next to godliness. 她非常爱惜自己的家，并深信整洁近于美德。