Just as a storm cannot prevail against a rocky mountain, so Mara can never overpower the man who lives meditating on the impurities, who is controlled in his senses, moderate in eating, and filled with faith and earnest effort.

The mirror image of the previous verse. The weak tree becomes the rocky mountain. The same four soil conditions appear in their disciplined form. The Buddha is not preaching austerity here. He is describing what is structurally weatherproof. A storm cannot move a mountain not because the mountain is virtuous but because the mountain is what it is — settled, weighted, in place. The teaching is that the settled mind becomes weatherproof in the same physical way, not because of moral attainment but because of structural integrity.