無量壽經優婆提舍願生偈註 2.63

2.63

此云何不思議？正覺阿彌陀不可思議，彼安樂淨土為正覺阿彌陀善力住持，云何可得思議耶？住名不異不滅，持名不散不失，如以不朽藥塗種子，在水不瀾、在火不燋，得因緣則生。何以故？不朽藥力故。若人一生安樂淨土，後時意願生三界教化眾生，捨淨土命隨願得生。雖生三界雜生水火中，無上菩提種子畢竟不朽。何以故？以逕正覺阿彌陀善住持故。

How is this inconceivable? The Correctly Enlightened One Amitābha is inconceivable; that Pure Land of Peace and Bliss is sustained by the skillful power of the Correctly Enlightened One Amitābha—how could it be conceivable? 'To abide' (zhu) means not changing and not perishing; 'to sustain' (chi) means not scattering and not being lost. It is like an incorruptible medicine coating a seed: in water it does not rot, in fire it does not burn, and upon meeting causes and conditions, it sprouts. Why? Because of the power of the incorruptible medicine. If a person is once reborn in the Pure Land of Peace and Bliss, and later wishes to be reborn in the three realms to teach and transform sentient beings, they may relinquish their life in the Pure Land and be reborn according to their wish. Although born into the mixed birth of the three realms, amidst water and fire, the seed of unsurpassable bodhi will ultimately never rot. Why? Because it has undergone the skillful sustaining power of Amitābha, the Correctly Enlightened One.