Śukadeva Gosvāmī refers to Nṛsiṁhadeva because of Prahlāda Mahārāja. Prahlāda Mahārāja was put into great distress by his powerful father, the demon Hiraṇyakaśipu. Apparently helpless before him, Prahlāda Mahārāja called on the Lord, who immediately assumed the gigantic form of Nṛsiṁhadeva, half-lion and half-man, to kill the gigantic demon. Although Kṛṣṇa is the original person, one without a second, He assumes different forms just to satisfy His devotees or to execute a specific purpose. Therefore Jayadeva Gosvāmī always repeats the name of Keśava, the original Personality of Godhead, in his prayers describing the Lord’s different incarnations for different purposes.

Although Vedic knowledge is imperishable, within this material world it is sometimes manifest and sometimes not. When the people of this material world become too absorbed in ignorance, the Vedic knowledge disappears. Lord Hayagrīva or Lord Matsya, however, always protects the Vedic knowledge, and in due course of time it is again distributed through the medium of Lord Brahmā. Brahmā is the trustworthy representative of the Supreme Lord. Therefore when he again asked for the treasure of Vedic knowledge, the Lord fulfilled his desire.

The Lord is always prepared to excuse His devotee, but if a devotee takes advantage of the Lord’s leniency and purposefully commits mistakes again and again, the Lord will certainly punish him by letting him fall down into the clutches of the illusory energy. In other words, theoretical knowledge acquired by studying the Vedas is insufficient to protect one from the clutches of māyā. One must strongly adhere to the lotus feet of the Lord in devotional service. Then one’s position is secure.

The Supreme Lord does not want any living being to act sinfully, and He begs him through his good conscience to refrain from sin. But when someone insists upon acting sinfully, the Supreme Lord gives him the sanction to act at his own risk (mattaḥ smṛtir jñānam apohanaṁ ca). No one can do anything without the sanction of the Lord, but He is so kind that when the conditioned soul persists in doing something, the Lord permits the individual soul to act at his own risk.

We offer our respectful obeisances unto the Supreme Personality of Godhead, the reservoir of all religious principles, who cleanses the heart of the conditioned soul in this material world. Again and again we offer our respectful obeisances unto Him.

In all the activities of creation and annihilation, the living entity is entangled in fruitive activities, which are executed by the illusory energy, māyā. He is exactly like a computer handled by the Supreme Personality of Godhead. The so-called scientists say that nature acts independently, but they cannot explain what nature is. Nature is nothing but a machine operated by the Supreme Personality of Godhead. When one understands the operator, his problems of life are solved.

From Saṅkarṣaṇa, Mahā-Viṣṇu expands, and from Mahā-Viṣṇu, Garbhodakaśāyī Viṣṇu expands. Lord Brahmā, who was born of Garbhodakaśāyī Viṣṇu, fathers Lord Śiva, from whom all the other demigods gradually evolve. Lord Brahmā, Lord Śiva and Lord Viṣṇu are incarnations of the different material qualities. Lord Viṣṇu is actually above all material qualities, but He accepts control of sattva-guṇa (the mode of goodness) to maintain the universe.

The incarnation of the Supreme Personality of Godhead known as Śeṣa or Ananta has unlimited strength, fame, wealth, knowledge, beauty and renunciation. As described in this verse, Ananta’s strength is so great that the innumerable universes rest on His hoods. He has the bodily features of a snake with thousands of hoods, and since His strength is unlimited, all the universes resting on His hoods feel no heavier than mustard seeds.

Anyone who remains unagitated, even in the presence of cause for agitation, is called dhīra, or equipoised. The Supreme Personality of Godhead, being always in a transcendental position, is never agitated by anything. Therefore someone who wants to become dhīra must take shelter of the lotus feet of the Lord. In Bhagavad-gītā (2.13) Kṛṣṇa says, dhīras tatra na muhyati: a person who is equipoised in all circumstances is never bewildered. Prahlāda Mahārāja is a perfect example of a dhīra. When the fierce form of Nṛsiṁhadeva appeared in order to kill Hiraṇyakaśipu, Prahlāda was unagitated. He remained calm and quiet, whereas others, including even Lord Brahmā, were frightened by the features of the Lord.

We cannot control the force of our anger. Therefore when we look at material things, we cannot avoid feeling attraction or repulsion for them. But the Supreme Lord is never affected in this way. Although He glances over the material world for the purpose of creating, maintaining and destroying it, He is not affected, even to the slightest degree. Therefore, one who desires to conquer the force of the senses must take shelter of the lotus feet of the Lord. Then he will be victorious.