书中自有黄金屋，书中自有颜如玉 shūzhōngzìyǒuhuángjīnwūshūzhōngzìyǒuyánrúyù study hard for success
Literally "within books one naturally finds houses of gold and beauties like jade"; used as a proverb to encourage diligence in study by promising that wealth and a beautiful wife will follow academic success.