7. I give birth to Father (Heaven) on his (own) head [Agni]; my womb is in the waters, in the sea.
Thence I spread forth across all worlds, and yonder heaven with its height I touch.
8. I, just like the wind, blow forth, grasping at all worlds,
beyond heaven, beyond this earth here—of such size in my greatness
have I come into being.
— The "Devi Upanishad" in its explanation of the theology of Shaktism, mentions and praises Shiva such as in its verse 19. Shiva, along with Vishnu, is a revered god in the "Devi Mahatmya", a text of Shaktism considered by the tradition to be as important as the "Bhagavad Gita". The Ardhanarisvara concept co-mingles god Shiva and goddess Shakti by presenting an icon that is half-man and half woman, a representation and theme of union found in many Hindu texts and temples.
Main article: Panchayatana puja
Oleograph by Raja Ravi Varma depicting a Shiva-centric Panchayatana. A bearded Shiva sits in the centre with his wife Parvati and their infant son Ganesha; surrounded by (clockwise from left upper corner) Ganesha, Devi, Vishnu, and Surya. Shiva's mount is the bull Nandi below Shiva.
In the Smarta tradition of Hinduism, Shiva is a part of its Panchayatana puja. This practice consists of the use of icons or anicons of five deities considered equivalent, set in a quincunx pattern. Shiva is one of the five deities, others being Vishnu, Devi (such as Parvati), Surya and Ganesha or Skanda or any personal god of devotee's preference (Ishta Devata).
Philosophically, the Smarta tradition emphasizes that all idols (murti) are icons to help focus on and visualize aspects of Brahman, rather than distinct beings. The ultimate goal in this practice is to transition past the use of icons, recognize the Absolute symbolized by the icons, on the path to realizing the nondual identity of one's Atman (soul, self) and the Brahman. Popularized by Adi Shankara, many Panchayatana mandalas and temples have been uncovered that are from the Gupta Empire period, and one Panchayatana set from the village of Nand (about 24 kilometers from Ajmer) has been dated to belong to the Kushan Empire era (pre-300 CE). The Kushan period set includes Shiva, Vishnu, Surya, Brahma and one deity whose identity is unclear.
Adiyogi Shiva statue, recognized by the "Guinness World Records" as the "Largest Bust Sculpture” in the world; the statue is for inspiring and promoting yoga, and is named "Adiyogi", which means "the first yogi", because Shiva is known as the originator of yoga.
Shiva is considered the Great Yogi who is totally absorbed in himself – the transcendental reality. He is the Lord of Yogis, and the teacher of Yoga to sages. As Shiva Dakshinamurthi, states Stella Kramrisch, he is the supreme guru who "teaches in silence the oneness of one's innermost self ("atman") with the ultimate reality ("brahman")."
The theory and practice of Yoga, in different styles, has been a part of all major traditions of Hinduism, and Shiva has been the patron or spokesperson in numerous Hindu Yoga texts. These contain the philosophy and techniques for Yoga. These ideas are estimated to be from or after the late centuries of the 1st millennium CE, and have survived as Yoga texts such as the "Isvara Gita" (literally, 'Shiva's song'), which Andrew Nicholson – a professor of Hinduism and Indian Intellectual History – states have had "a profound and lasting influence on the development of Hinduism".
Other famed Shiva-related texts influenced Hatha Yoga, integrated monistic ("Advaita Vedanta") ideas with Yoga philosophy and inspired the theoretical development of Indian classical dance. These include the "Shiva Sutras", the "Shiva Samhita", and those by the scholars of Kashmir Shaivism such as the 10th-century scholar Abhinavagupta. Abhinavagupta writes in his notes on the relevance of ideas related to Shiva and Yoga, by stating that "people, occupied as they are with their own affairs, normally do nothing for others", and Shiva and Yoga spirituality helps one look beyond, understand interconnectedness, and thus benefit both the individual and the world towards a more blissful state of existence.
Main article: Trimurti
An art depiction of the Trimurti, with Shiva depicted on the right, at the Hoysaleswara temple in Halebidu.
The Trimurti is a concept in Hinduism in which the cosmic functions of creation, maintenance, and destruction are personified by the forms of Brahma the creator, Vishnu the maintainer or preserver and Shiva the destroyer or transformer. These three deities have been called "the Hindu triad" or the "Great Trinity". However, the ancient and medieval texts of Hinduism feature many triads of gods and goddesses, some of which do not include Shiva.
Shiva with Parvati. Shiva is depicted three-eyed, the Ganges flowing through his matted hair, wearing ornaments of serpents and a skull garland, covered in ashes, and seated on a tiger skin
A seated Shiva holds an axe and deer in his hands.
According to Gavin Flood, "Shiva is a god of ambiguity and paradox," whose attributes include opposing themes. The ambivalent nature of this deity is apparent in some of his names and the stories told about him.
Shiva is represented in his many aspects. Left: Bhairava icon of the fierce form of Shiva, from 17th/18th century Nepal; Right: Shiva as a meditating yogi in Rishikesh.
In Yajurveda, two contrary sets of attributes for both malignant or terrifying (Sanskrit: 'rudra') and benign or auspicious (Sanskrit: 'śiva') forms can be found, leading Chakravarti to conclude that "all the basic elements which created the complex Rudra-Śiva sect of later ages are to be found here". In the Mahabharata, Shiva is depicted as "the standard of invincibility, might, and terror", as well as a figure of honor, delight, and brilliance.
The duality of Shiva's fearful and auspicious attributes appears in contrasted names. The name Rudra reflects Shiva's fearsome aspects. According to traditional etymologies, the Sanskrit name "Rudra" is derived from the root "rud-", which means "to cry, howl". Stella Kramrisch notes a different etymology connected with the adjectival form "raudra", which means "wild, of "rudra" nature", and translates the name "Rudra" as "the wild one" or "the fierce god". R. K. Sharma follows this alternate etymology and translates the name as "terrible". Hara is an important name that occurs three times in the Anushasanaparvan version of the "Shiva sahasranama", where it is translated in different ways each time it occurs, following a commentorial tradition of not repeating an interpretation. Sharma translates the three as "one who captivates", "one who consolidates", and "one who destroys". Kramrisch translates it as "the ravisher". Another of Shiva's fearsome forms is as "Kāla" "time" and "Mahākāla" "great time", which ultimately destroys all things. The name "Kāla" appears in the "Shiva Sahasranama", where it is translated by Ram Karan Sharma as "(the Supreme Lord of) Time". Bhairava "terrible" or "frightful" is a fierce form associated with annihilation. In contrast, the name "Śaṇkara", "beneficent" or "conferring happiness" reflects his benign form. This name was adopted by the great Vedanta philosopher Adi Shankara (c. 788–820), who is also known as Shankaracharya. The name "Śambhu" (Sanskrit: शम्भु swam-on its own; bhu-burn/shine) "self-shining/ shining on its own", also reflects this benign aspect.
Shiva is depicted both as an ascetic yogi, and as a householder with goddess Parvati.