妙法蓮華經玄贊 9.74

9.74

贊曰：智積疑也。有四：一時長，二行廣，三處遍，四意大方得菩提，故生疑也。

The Commentary says: Prajñākūṭa doubts. There are four points: first, the long time; second, the broad practices; third, the pervasive places; fourth, the vast resolve with which one only then attains bodhi; hence he raises doubts.