瑜伽論記 1.76

1.76

問起三因：初云問者先聞諸經所說，瑜伽師地其義未了，故為此問。或作論者，先總受請，欲為解說，自假興問。又發問者有五：一、不解故問，二、疑惑故問，三、試驗故問，四、輕觸故問，五、為欲利樂有情故問。今是第五問也。但答十七，釋第三徵何等十七及解頌文。

The question arises from three causes: First, it is said that the questioner, having previously heard what was taught in the sūtras, did not yet fully understand the meaning of the stages of a yoga practitioner, and therefore posed this question. Or, the author of the treatise, having initially accepted a general request and wishing to explain it, himself artificially raised the question. Furthermore, questioners are of five kinds: first, asking because of non-comprehension; second, asking because of doubt; third, asking by way of a test; fourth, asking with contemptuous intent; fifth, asking out of a desire to benefit and bring joy to sentient beings. The present question is of the fifth kind. It answers only [with the number] seventeen, explains the third interrogation—'What are the seventeen?'—and interprets the verse text.