B. As for the reason why this needed to be composed

As for telling the manner of composition, regarding the time:

These days, by the impure sight of ordinary minds,
The separate paths of the mantra and paramita traditions
Are grasped as contradictory, and cannot be combined.
Therefore people have a partial eye for both.

When the former learned and accomplished ones had departed, their great, long-standing traditions were agitated by people's own conceptual ideas, and became unclear. By completely fixating the individual paths of the great tantras of mantrayana and the perfections of the paramita tradition, not having heard much, only stirred up by bad thoughts of sophistry, fools arrogant about their alleged learning grasped them as contradictory. After that, even those of profound realization were not able to gather them into one.

By devoting themselves to each little word of these fools, even they came to have the eye of partiality.