The seven kinds of suchness as taught in the Treatise on the Eighteen Emptinesses. The seven are the suchness of arising 生真如， the suchness of marks 相真如， the suchness of consciousness 识真如， the suchness of bases 依止真如， the suchness of mistaken activity 邪行真如， the suchness of purity 清净真如， and the suchness of correct activity 正行真如. ［十八空论 1616.31.］