本书是三毛与读者交流的书信集。在这些书信中，三毛敞开了自己真挚的内心，既为年青的读者在学业和感情道路上遇见的种种问题指点迷津，帮助他们去战胜成长过程中的迷惘和痛苦，也为自己提供了一面明镜，擦拂了内心的朦胧，收获了共勉之感。在三毛看来，透过书信呼应的方式，或许人与人之前竖起的高墙能够成为透明，或许不必那么晶莹透明，或而有些光线照亮一霎间幽暗的心灵，带来一丝欣慰。
This is a collection of letters between San Mao and readers. In these letters, San Mao opened her sincere inner world to us, to give suggestions about the various problems facing young readers in study and love and help them overcome the puzzles and pains in growth, which also offered a mirror to San Mao for her to dust away the blurs in heart and gain mutual encouragement. In the part of San Mao, through correspondence, the high walls between people can become transparent, or some light may shine in the gloomy heart for a while to bring a trace of comfort.