Some way or other, if someone establishes in his mind his continuous relationship with Kṛṣṇa, this relationship is called remembrance. About this remembrance there is a nice statement in the Viṣṇu Purāṇa, where it is said, "Simply by remembering the Supreme Personality of Godhead all living entities become eligible for all kinds of auspiciousness. Therefore let me always remember the Lord, who is unborn and eternal." In the Padma Purāṇa the same remembrance is explained as follows: "Let me offer my respectful obeisances unto the Supreme Lord Kṛṣṇa, because if someone remembers Him, either at the time of death or during his span of life, he becomes freed from all sinful reactions."
(Nectar of Devotion).

It is described in the Viṣṇu Purāṇa that when Akrūra came to take Kṛṣṇa and Balarāma to Mathurā, just by seeing Their faces he became so cheerful that all over his body there were symptoms of ecstatic love. This state is called happiness.
(Nectar of Devotion).

At the present moment almost everyone is engaged in some kind of fruitive activity. Those who are desirous of gaining material profits by working are called karmīs, or fruitive workers. All living entities within this material world have come under the spell of māyā. This is described in the Viṣṇu Purāṇa (6.7.61):
viṣṇu-śaktiḥ parā proktā
kṣetrajñākhyā tathā parā
avidyā-karma-saṁjñānyā
tṛtīyā śaktir iṣyate
(CC.2:6:154)
Sages have divided the energies of the Supreme Personality of Godhead into three categories—namely, the spiritual energy, marginal energy and material energy. The material energy is considered to be the third-class energy (tṛtīyā śaktiḥ). Those living beings within the jurisdiction of the material energy sometimes engage themselves like dogs and hogs in working very hard simply for sense gratification. However, in this life, or, after executing pious activities, in the next life, some karmīs become strongly attracted to performing various kinds of sacrifices mentioned in the Vedas. Thus on the strength of their pious merit, they are elevated to heavenly planets. Actually those who perform sacrifices strictly according to Vedic injunctions are elevated to the moon and planets above the moon.
(Nectar of Instruction).

According to the Viṣṇu Purāṇa, the material energy is called avidyā, or nescience, and is exhibited in the fruitive activities of sense enjoyment. But although the living being has the tendency to be illusioned and trapped by the material energy for sense enjoyment, he belongs to the antimaterial energy, or spiritual energy. In this sense the living being is the positive energy, whereas matter is the negative energy. Matter does not develop unless in contact with the superior spiritual, or antimaterial, energy, which is directly part and parcel of the spiritual whole. The subject matter of this spiritual energy exhibited by living beings is undoubtedly very complicated for an ordinary man, who is therefore astounded by the subject. Sometimes he partially understands it through the imperfect senses, and sometimes he fails to know it altogether. It is best, therefore, to hear from the highest authority, Śrī Kṛṣṇa, or from His devotee who represents Him in the chain of disciplic succession.
(Easy journey to other Planets).

Devakī was very much afraid of her brother Kaṁsa because he had already killed so many of her children. So she was very anxious about Kṛṣṇa. In the Viṣṇu Purāṇa it is stated that in order to pacify Devakī, all the demigods, along with their wives, used to visit her to encourage her not to be afraid that her son would be killed by Kaṁsa. Kṛṣṇa, who was within her womb, was to appear not only to diminish the burden of the world but specifically to protect the interests of the Yadu dynasty, and certainly to protect Devakī and Vasudeva. It is understood that Kṛṣṇa had been transferred from the mind of Vasudeva to the mind of Devakī, and from there to her womb. Thus all the demigods worshiped Devakī, the mother of Kṛṣṇa.
(Krsna Book).

In the form of a cowherd boy, Lord Kṛṣṇa was very little in comparison to Brahmā, but because He is the Supreme Personality of Godhead, He could immediately understand that all the calves and boys had been stolen by Brahmā. Kṛṣṇa thought, "Brahmā has taken away all the boys and calves. How can I alone return to Vṛndāvana? The mothers will be aggrieved!"
Therefore in order to satisfy the mothers of His friends, as well as to convince Brahmā of the supremacy of the Personality of Godhead, He immediately expanded Himself as the cowherd boys and calves. In the Vedas it is said that the Supreme Personality of Godhead has already expanded Himself into so many living entities by His energy. Therefore it was not very difficult for Him to expand Himself again into so many boys and calves. He expanded Himself to become exactly like the boys, who were of all different features and facial and bodily construction, and who were different in their clothing and ornaments and in their behavior and personal activities. In other words, although each boy, being an individual soul, had entirely different tastes, activities and behavior, Kṛṣṇa exactly expanded Himself into all the different positions of the individual boys. He also became the calves, who were also of different sizes, colors, activities, etc. This was possible because everything is an expansion of Kṛṣṇa's energy. In the Viṣṇu Purāṇa it is said, parasya brahmaṇaḥ śaktiḥ. Whatever we actually see in the cosmic manifestation—be it matter or the activities of the living entities—is simply an expansion of the energies of the Lord, as heat and light are the different expansions of fire.
(Krsna Book).

While Jarāsandha was attempting his eighteenth attack, a Yavana king somewhere to the south of Mathurā became attracted by the opulence of the Yadu dynasty and also attacked the city. It is said that the King of the Yavanas, known as Kālayavana, was induced to attack by Nārada. This story is narrated in the Viṣṇu Purāṇa. Once, Garga Muni, the priest of the Yadu dynasty, was taunted by his brother-in-law. When the kings of the Yadu dynasty heard the taunt they laughed at him, and Garga Muni became angry at the Yadu kings. He decided that he would produce someone who would be very fearful to the Yadu dynasty, so he pleased Lord Śiva and received from him the benediction of a son. He begot this son, Kālayavana, in the wife of a Yavana king. This Kālayavana inquired from Nārada, "Who are the most powerful kings in the world?" Nārada informed him that the Yadus were the most powerful. Thus informed, Kālayavana attacked the city of Mathurā at the same time that Jarāsandha tried to attack it for the eighteenth time. Kālayavana was very eager to declare war on a king of the world who would be a suitable combatant for him, but he had not found any. However, being informed about Mathurā by Nārada, he thought it wise to attack this city with thirty million Yavana soldiers.
(Krsna Book).

Because the spirit soul (jīva) is born of the Lord's superior, spiritual energy, it has little in common with the material energy, just as the aquatics have no affinity for the land and the land beasts are out of place in the water. The apparent close connection between the material energy and the spiritual energy is in fact illusory. The jīvas, being a product of the spiritual energy, try to exploit the material energy, but ultimately such attempts fail, because it is impossible for one energy to always exploit and lord it over another energy. The jīvas can, however, eternally serve the Supreme Energetic, Lord Kṛṣṇa. When the jīva exploits the material energy in his endeavor to serve the Lord, that activity is transcendental—the performance of sacrifice. Any other kind of activity amounts to nothing but materialistic, fruitive work.
In the Viṣṇu Purāṇa (6.7.61) one reads about the three kinds of energy:
viṣṇu-śaktiḥ parā proktā
kṣetra jñākhyā tathā parā
avidyā-karma-saṁjñānyā
tṛtīyā śaktir iṣyate
(CC.2:6:154)
The potency of Lord Viṣṇu is summarized in three categories—namely, the spiritual potency, the living entities, and ignorance. The spiritual potency is full of knowledge; the living entities, although belonging to the spiritual potency, are subject to bewilderment; and the third energy, which is full of ignorance, is always visible in fruitive activities.
Thus all phenomena in this material world are simply interactions of the Supreme Lord's superior, spiritual energy with His inferior, material energy. The material energy is known as the kṣetra, or field of activity, and the spiritual energy is known as the kṣetra-jña, or the knower of the field of activity. All the different species of living entities, with their varied characteristics, are produced by the interaction of the kṣetra and the kṣetra-jña. The energetic principle, the controller of both these energies, is the Supreme Personality of Godhead, Kṛṣṇa. He must be recognized as the ultimate cause of the creation, maintenance, and annihilation of this cosmic manifestation.
(Renunciation through Wisdom).

To refute this impersonal conception of the Absolute, the previously quoted verse from Śrīmad-Bhāgavatam unequivocally states that the Absolute Truth is a person. This transcendental personality is so powerful that He could impart the knowledge of the Vedas even to Lord Brahmā, who then went on to create the material universe. Lord Brahmā did not receive this extraordinary Vedic knowledge after creation but before he began the work of creation. The knowledge that existed before the mundane nature came into being is transcendental and is known as saṁvit. The Viṣṇu Purāṇa delves into the subjects of sandhinī, saṁvit, and hlādinī, the Lord's potencies of existence, knowledge, and pleasure. All together, these are known as the Lord's internal potency, or spiritual potency. The Śrīmad-Bhāgavatam also discusses the subject of the Lord's internal potency. This superior potency is quite different form the Lord's inferior, external potency, which is qualified by the three material modes. An example of the Lord's superior, spiritual potency is the jīvas. One who can understand that the jīvas are a product of the Lord's internal potency, not His external potency, can immediately grasp the difference between these two potencies.
(Renunciation through Wisdom).

Although fixed in His abode, the Personality of Godhead is swifter than the mind and can overcome all others running. The powerful demigods cannot approach Him. Although in one place, He controls those who supply the air and rain. He surpasses all in excellence.
Through mental speculation, even the greatest philosopher cannot know the Supreme Lord, who is the Absolute Personality of Godhead. He can be known only by His devotees through His mercy. In the Brahma-saṁhitā (5.34) it is stated that even if a nondevotee philosopher travels through space at the speed of the wind or the mind for hundreds of millions of years, he will still find that the Absolute Truth is far, far away from him. The Brahma-saṁhitā (5.37) further describes that the Absolute Personality of Godhead has His transcendental abode, known as Goloka, where He remains and engages in His pastimes, yet by His inconceivable potencies He can simultaneously reach every part of His creative energy. In the Viṣṇu Purāṇa His potencies are compared to the heat and light that emanate from a fire. Although situated in one place, a fire can distribute its light and heat for some distance; similarly, the Absolute Personality of Godhead, although fixed in His transcendental abode, can diffuse His different energies everywhere.
(Sri Isopanishad).

Material scientists and politicians are trying to make this place deathless because they have no information of the deathless spiritual nature. This is due to their ignorance of the Vedic literature, which contains full knowledge confirmed by mature transcendental experience. Unfortunately, modern man is averse to receiving knowledge from the Vedas, Purāṇas and other scriptures.
From the Viṣṇu Purāṇa (6.7.61) we receive the following information:
viṣṇu-śaktiḥ parā proktā
kṣetra-jñākhyā tathā parā
avidyā-karma-saṁjñānyā
tṛtīyā śaktir iṣyate
(CC.2:6:154)
Lord Viṣṇu, the Personality of Godhead, possesses different energies, known as parā (superior) and aparā (inferior). The living entities belong to the superior energy. The material energy, in which we are presently entangled, is the inferior energy. The material creation is made possible by this energy, which covers the living entities with ignorance (avidyā) and induces them to perform fruitive activities. Yet there is another part of the Lord's superior energy that is different from both this material, inferior energy and the living entities. That superior energy constitutes the eternal, deathless abode of the Lord.
(Sri Isopanishad).