Enforcement
Srimad-Bhagavatam
SB Canto 3
SB 3.17.15, Purport:
According to Bhagavad-gītā, Seventh Chapter, the laws of nature are so stringent that it is impossible for the living entity to surpass their enforcement. It is also explained that only those who are fully surrendered to Kṛṣṇa in Kṛṣṇa consciousness can be saved. We can learn from the description of the Śrīmad-Bhāgavatam that it is because of the birth of two great demons that there were so many natural disturbances.