俱舍論記 24.106

24.106

「論曰至俱能離故」者，唯無漏道離有頂染，此於無漏勢力增強，自、上地等皆能治故，非有漏道。所以者何？唯於次上近分地中起世俗道治下地惑，此有頂上更無世俗近分道故，非上斷下。雖有自地有漏治道，自地不能治自地故。所以者何？自地治道，自地煩惱所隨增故。如人被縛，不能自解。復《正理》云「若彼煩惱於此道隨增，此道必不能治彼煩惱。若此道力能對治彼，則彼惑於此道必不隨增。故自地道不治自地。雖下地道，非上地惑之所隨增，勢力劣故，下非斷上。釋下一句，如文可知。

[On the text,] "The Treatise says [...] because both are capable of detaching": Only an anāsrava path detaches from the defilements of the Peak of Existence (bhavāgra), because the power of the anāsrava is superior and it can counteract both its own and higher stages, whereas a sāsrava path cannot. Why is this? A conventional path is generated only in the immediately higher threshold stage to counteract the defilements of a lower stage; above this Peak of Existence there is no further conventional threshold path, so a higher one cannot sever the lower. Although there is a sāsrava path of counteraction of its own stage, its own stage cannot counteract its own stage. Why is this? The path of counteraction of its own stage is increased in accordance by the defilements of its own stage, just as a bound person cannot untie himself. Furthermore, the Nyāyānusāra states: "If those defilements increase in accordance with this path, this path certainly cannot counteract those defilements. If the power of this path can counteract them, then those defilements certainly do not increase in accordance with this path. Therefore, the path of its own stage does not counteract its own stage." Although the path of a lower stage is not increased in accordance by the defilements of a higher stage, because its power is inferior, a lower one does not sever a higher one. The explanation of the next line is understandable from the text.