仁王護國般若波羅蜜多經疏 2.43

2.43

Explanation: 'Exist because of the accumulation of causes' means that all karma created by contaminated wholesome and defiled [states] constitutes the causes of the three realms of existence; they exist because of the truth of origin (samudaya-satya). 'Exist because of the accumulation of fruits' means that within the three realms, the fruits of pure neutral fruition (anivṛtāvyākṛta) retributed by universal and particular karma exist because of the truth of suffering (duḥkha-satya). 'Exist because of the six destinies' means that destinies refer to maturation (vipāka): the six, namely hell-beings, hungry ghosts, animals, asuras, humans, and devas. That which leads [to them] is the cause, and that which is arrived at is the fruit; the former is particular and the latter is universal, explaining the three realms. Next is the third [section], explaining transworldly existence.