《棋经十三篇·杂说篇》
说到下棋，有与无相互赖以生存，远与近相互补充促进，强与弱相互映衬烘托，利与害相互倾斜移动，下棋的人不可不察。
夫棋者有无之相生，远近之相成，强弱之相形，利害之相倾，不可不察也。
When playing chess, having and not having are mutually dependent, far and near complement each other, strong and weak contrast each other, and advantage and disadvantage influence each other. Chess players must be aware of this.