Five is a sacred number for Shiva. One of his most important mantras has five syllables (namaḥ śivāya).
Shiva's body is said to consist of five mantras, called the pañcabrahmans. As forms of God, each of these have their own names and distinct iconography:
These are represented as the five faces of Shiva and are associated in various texts with the five elements, the five senses, the five organs of perception, and the five organs of action. Doctrinal differences and, possibly, errors in transmission, have resulted in some differences between texts in details of how these five forms are linked with various attributes. The overall meaning of these associations is summarized by Stella Kramrisch:
Through these transcendent categories, Śiva, the ultimate reality, becomes the efficient and material cause of all that exists.
According to the Pañcabrahma Upanishad:
One should know all things of the phenomenal world as of a fivefold character, for the reason that the eternal verity of Śiva is of the character of the fivefold Brahman.
Shiva is a god of ambiguity and paradox," whose attributes include opposing themes. The ambivalent nature of this deity.
In the Yajurveda, two contrary sets of attributes for both malignant or terrific (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 (Sanskrit: रुद्र) reflects his 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 (Sanskrit: हर) 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 (Sanskrit: काल), "time", and as Mahākāla (Sanskrit: महाकाल), "great time", which ultimately destroys all things. Bhairava (Sanskrit: भैरव), "terrible" or "frightful", is a fierce form associated with annihilation.
OM NAMAH SHIVAYA
GOOD NIGHT WORLD