In “Female Instructions,” Cai Yong warns his daughter that while facial beauty is important, when it comes to grooming one’s appearance, one must not forget that moral and intellectual cultivation are more important for women. The general idea of this sentence is: If the face is not decorated for a day, it will get dirty with dirt and grime; If the heart does not cultivate goodness for a day, evil thoughts will flow into it.
在《女训》中，蔡邕告诫女儿，面容的美丽固然很重要，但当修饰面容的时候，千万不要忘记了品德和学识的修养对女人来说更为重要。本句大意：脸一天不修饰，就会让尘垢弄脏；心一天不修善，就会窜入邪恶的念头。
古代名言翻译
面一旦不修饰，则尘垢秽之；心一朝不思善，则邪恶入之。——蔡邕·《女训》
If one doesn’t wash one’s face every day, the dirt cannot be removed from it; if one doesn’t cultivate one’s mind daily, the evil idea will appear suddenly.
