說無垢稱經疏 6.306

6.306

贊曰：二勸除順違。見淨土之順已，勿生歡喜而起貪著。見穢土之違已，勿生憂惱而起嗔恚。淨之與穢，俱利樂故。

Commentary: Second, exhorting the elimination of agreeable and disagreeable [reactions]. Having seen the agreeableness of a pure land, do not give rise to joy and arouse greedy attachment. Having seen the disagreeableness of an impure land, do not give rise to grief and distress and arouse resentment and anger. Pure and impure alike benefit and bring happiness.