瑜伽論記 2.221

2.221

十難者，準下結句中，十故字故云也。一、不覺為先難；二、世間所作為以覺為因下，思覺為先難；三、為即於蘊施設有我下，於蘊假設難；四、為即見者等相下，於彼立有難；五、為與染淨相應下，建立染淨難；六、為與流轉相相應下，流轉止息難；七、為由境界所生若苦樂下，作受解脫難；八、又汝今應說自所欲？為唯於我說為作者下，施設作者難：九、又汝應說自意所欲？為準於我建立於我下，施設言說難；十、計我之見為善不善下，施設眾見難。

As for the ten challenges, they are so named in accordance with the ten occurrences of the character ‘because’ (故) in the concluding lines below: 1. the challenge of awareness not being prior; 2. from ‘Are the worldly actions caused by awareness?’ onwards, the challenge of thought and awareness being prior; 3. from ‘Is a self designated on the aggregates?’ onwards, the challenge of designation upon the aggregates; 4. from ‘Is it identical with the seer, etc.?’ onwards, the challenge of establishing existence upon them; 5. from ‘Is it associated with defilement and purification?’ onwards, the challenge of establishing defilement and purification; 6. from ‘Is it associated with the characteristics of saṃsāra?’ onwards, the challenge of saṃsāra and its cessation; 7. from ‘Is it through suffering and pleasure produced by objects?’ onwards, the challenge of agent, experiencer, and liberation; 8. from ‘Furthermore, you should now state what you intend: is the self alone spoken of as the agent?’ onwards, the challenge of designating an agent; 9. from ‘Furthermore, you should state what your intention is: is the self established based on the self?’ onwards, the challenge of designating discourse; 10. from ‘Is the view asserting a self wholesome or unwholesome?’ onwards, the challenge of designating various views.