Swayambhu or स्वयम्भू is a Sanskrit word that means "self-manifested", "self-existing" or "that is created by its own accord". In Sikh prayer it is called Ajuni Saibham. In Tibetan, this word appears as "Rangjung".

The word Swayambhu is used to describe a self-manifested image of a deity, otr ku (Tibetan) which was not made by human hands, but instead is naturally arisen, or generated by nature.

The word etymology of swayambhu is Svayam (स्वयम्) which means self or on its own and bhu (भू) which means to take birth or arising. The idol of Venkateshwara at Tirumala is one such example.

In Sikh prayer the word ‘Ajuni’ makes God to be unborn. Saibham (saibhang) explains God as self-manifested, self-existent or self-effulgent.

Based on details in Bhagavada Purana and Matsya Purana, Narayana is said to be the self-manifested Swayambhu form of Brahman as the first cause of creation.

The Manu Smriti says, “In the beginning, all this existence was one undifferentiated, un-manifested, indefinable, unarguable and unknown in every way. From this condition arose the Universe of ‘name and form’ (namarupa), through the medium of the Self-existent Creator, Svayambhu.”

In terms of quantum physics, from the quantum field of unmanifest arose the quantum fluctuation, which led to the birth of hirnagarbha or the golden egg leading to the birth of universe.

In Spiritual Vedic Science, consciousness, soul and the spirit are Swyambhu. Soul never dies and is never born. It is self existing in the universe. The very basic nature of any living cell is multiplication and that can only happen in the presence of Swyambhu.

In quantum physics, a quantum fluctuation (or vacuum state fluctuation or vacuum fluctuation) is the temporary change in the amount of energy in a point in space as explained in Werner Heisenbergs uncertainty principle. This allows the creation of particle-antiparticle pairs of virtual particles. Quantum fluctuations may have been necessary in the origin of the structure of the universe: according to the model of expansive inflation the ones that existed when inflation began were amplified and formed the seed of all current observed structure.

A quantum fluctuation is the temporary appearance of energetic particles out of empty space, as allowed by the uncertainty principle.

The uncertainty principle states that for a pair of conjugate variables such as position/momentum or energy/time, it is impossible to have a precisely determined value of each member of the pair at the same time. For example, a particle pair can pop out of the vacuum during a very short time interval.

In Puranas, it is mentioned that Hirnagarbha the golden egg remained floating for a year and did not divide till it was entered by a Swyambhu or in other words experienced a quantum fluctuation.

Based on this theory it is possible that the whole universe could have been created at the same time without going through the Darwinian principles.

In Bhagavad Gita Chapter 10, Krishna says “ He who knows Me as the unborn, as the beginningless...”.

“The seven great sages and before them the four other great sages and the Manus [progenitors of mankind] are born out of My mind, and all creatures in these planets descend from them”

• 10.20: I am the Self, O Gudakesa, seated in the hearts of all creatures. I am the beginning, the middle and the end of all beings.
• 10.21: Of the Adityas I am Visnu, of lights I am the radiant sun, I am Marici of the Maruts, and among the stars I am the moon.
• 10.22: Of the Vedas I am the Sama-veda; of the demigods I am Indra; of the senses I am the mind, and in living beings I am the living force [knowledge].
• 10.23: Of all the Rudras I am Lord Siva; of the Yaksas and Raksasas I am the lord of wealth [Kuvera]; of the Vasus I am fire [Agni], and of the mountains I am Meru.
• 10.24: Of priests, O Arjuna, know Me to be the chief, Brhaspati, the lord of devotion. Of generals I am Skanda, the lord of war; and of bodies of water I am the ocean.
• 10.25: Of the great sages I am Bhrgu; of vibrations I am the transcendental om. Of sacrifices I am the chanting of the holy names [japa], and of immovable things I am the Himalayas.
• 10.26: Of all trees I am the holy fig tree, and amongst sages and demigods I am Narada. Of the singers of the gods [Gandharvas] I am Citraratha, and among perfected beings I am the sage Kapila.
• 10.27: Of horses know Me to be Uccaihsrava, who rose out of the ocean, born of the elixir of immortality; of lordly elephants I am Airavata, and among men I am the monarch.
• 10.28: Of weapons I am the thunderbolt; among cows I am the surabhi, givers of abundant milk. Of procreators I am Kandarpa, the God of love, and of serpents I am Vasuki, the chief.
• 10.29: Of the celestial Naga snakes I am Ananta; of the aquatic deities I am Varuna. Of departed ancestors I am Aryama, and among the dispensers of law I am Yama, lord of death.
• 10.30: Among the Daitya demons I am the devoted Prahlada; among subduers I am time; among the beasts I am the lion, and among birds I am Garuda, the feathered carrier of Visnu.
• 10.31: Of purifiers I am the wind; of the wielders of weapons I am Rama; of fishes I am the shark, and of flowing rivers I am the Ganges.
• 10.32: Of all creations I am the beginning and the end and also the middle, O Arjuna. Of all sciences I am the spiritual science of the Self, and among logicians I am the conclusive truth.
• 10.33: Of letters I am the letter A, and among compounds I am the dual word. I am also inexhaustable time, and of creators I am Brahma, whose manifold faces turn everywhere.
• 10.34: I am all-devouring death, and I am the generator of all things yet to be. Among women I am fame, fortune, speech, memory, intelligence, faithfulness and patience.
• 10.35: Of hymns I am the Brhat-sama sung to the Lord Indra, and of poetry I am the Gayatri verse, sung daily by brahmanas. Of months I am November and December, and of seasons I am flower-bearing spring.
• 10.36: I am also the gambling of cheats, and of the splendid I am the splendor. I am victory, I am adventure, and I am the strength of the strong.
• 10.37: Of the descendants of Vrsni I am Vasudeva, and of the Pandavas I am Arjuna. Of the sages I am Vyasa, and among great thinkers I am Usana.