Now, by way of showing how the perfection of diligence surpasses the perfections of generosity, moral discipline and tolerance, the fourth resolve is explained:

Good qualities come in the wake of diligence;
What brings one stores of merit and intelligence.
As this is where their diligence is burning strong,
This ground, the fourth among them, is the Radiant. (4.1)

If one has no enthusiasm for virtuous ways, one will not apply oneself in all manners to generosity and so forth, thus making it impossible for all the good qualities to arise. With a formerly established keenness for accumulating good qualities, what has been gained will increase and what has not been gained becomes achievable. Thus, diligence is the cause of each and every good quality. That it is the cause of the two accumulations was already explained above. Being the ground where diligence blazes forth as it refines all one’s good qualities, this fourth bodhisattva ground is therefore named Radiant (arciṣmatī).