Krsna is present everywhere, not only within the universe, not only within the hearts of all living entities, but also within every atom. In the prayers of Queen Kunti we find mention of this inconceivable potency of Krsna. While Krsna was talking with Kunti, He simultaneously entered the womb of Uttara, who was in danger due to the atomic weapon of Asvatthama. Krsna can illusion even Lord Brahma and Lord Siva, and He can protect all surrendered devotees from the reaction of sinful activities. These are some of the examples of His inconceivable potencies.
Srila Rupa Gosvami therefore offers his obeisances unto Krsna by saying, "Krsna, who is present as a human being, has as His mere shadow the whole material nature. He has expanded Himself into so many cows, calves and cowherd boys, and He has again manifested Himself in all of them as the four-handed Narayana. He has taught millions of Brahmas self-realization, and thus He is worshipable not only by the heads of all universes, but by everyone else also. Therefore let me always accept Him as the Supreme Personality of Godhead."
When Indra was defeated by Krsna in the matter of taking the parijata plant from heaven, Narada met Indra and criticized him: "O Indra, great King of heaven, Krsna has already defeated Lord Brahma and Lord Siva. So what can be said of an insignificant demigod like you?" Narada Muni, of course, was criticizing Indra jokingly, and Indra enjoyed it. In Narada's statement it is confirmed that Krsna was able to illusion even Lord Brahma and Lord Siva, as well as Indra. So there is no question of Krsna's power to do the same to lesser living entities.
A description of Krsna's power in minimizing the sufferings of sinful reactions is given in Brahma-samhita as follows: "Beginning from the great King of heaven down to the ant, everyone is undergoing the reactions of past deeds. But a devotee of Krsna is relieved from such reactions by the grace of Krsna." This was clearly proved when Krsna went to the place of Yamaraja, the Lord of death, to reclaim the dead sons of His teacher. Krsna's teacher had requested Krsna to bring back his dead sons, and to do so Krsna went to the place of Yamaraja to claim those souls, who had been brought there by Yamaraja and were being kept under his control. Krsna immediately ordered Yamaraja, "Be benefited by My order and return those souls unto Me!" The purport of this incident is that even a person who is under the regulative principles of the laws of nature, and is therefore punishable by Yamaraja under these laws, can be granted complete immunity by the grace of Krsna.
Krsna's inconceivable potencies have been described by Sukadeva Gosvami as follows: "Krsna is bewildering my intelligence because, although He is unborn, He has appeared as the son of Nanda Maharaj. He is all-pervading, but still He is held on the lap of Yasoda. In spite of His being all-pervasive, He has become limited by the love of Yasoda. Although He has innumerable forms, still He is moving as one Krsna before His father and mother, Nanda and Yasoda." In the Brahma-samhita also it is said that although Krsna is eternally living in Goloka Vrndavana, His transcendental abode, He is still present everywhere, even within the atoms.

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