Vajra in the context of "Vritra"

A thunderbolt, or lightning bolt, is a symbolic representation of lightning. It appears variously in history, literature, and in contemporary warnings of (typically high-voltage) electricity. Thunderbolts may appear naturally among the estimated 8.6 million lightning strikes per day or not: heat lightning is an electrical discharge in the atmosphere without an accompanying sound, and a Tesla coil produces an artificial "lightning"-like electrical discharge with an accompanying clap. The term "thunderbolt" adds the notion of a loud thunderclap accompanying a lightning flash, while the term "lightning bolt" — which refers directly to the electrical discharge — does not.

In Indo-European mythology, the thunderbolt was identified with the 'Sky Father'; this association is also found in later Hellenic representations of Zeus and Vedic descriptions of the vajra wielded by the god Indra. It may have been a symbol of cosmic order, as expressed in the fragment from Heraclitus describing "the Thunderbolt that steers the course of all things".

Buddhist art is visual art produced in the context of Buddhism. It includes depictions of Gautama Buddha and other Buddhas and bodhisattvas, notable Buddhist figures both historical and mythical, narrative scenes from their lives, mandalas, and physical objects associated with Buddhist practice, such as vajras, bells, stupas and Buddhist temple architecture. Buddhist art originated in the north of the Indian subcontinent, in modern India, Pakistan and Afghanistan, with the earliest survivals dating from a few centuries after the historical life of Siddhartha Gautama from the 6th to 5th century BCE.

As Buddhism spread and evolved in each new host country, Buddhist art followed in its footsteps. It developed to the north through Central Asia and into Eastern Asia to form the Northern branch of Buddhist art, and to the east as far as Southeast Asia to form the Southern branch of Buddhist art. In India, Buddhist art flourished and co-developed with Hindu and Jain art, with cave temple complexes built together, each likely influencing the other.

A vajrācārya (vajra + acharya, Tibetan: རྡོ་རྗེ་སློབ་དཔོན་, dorje lopön, Wyl. rdo rje slob dpon, Chinese: 金剛阿闍梨, pinyin: jīngāng āshélì; rōmanji: kongō ajari) (alternatively, Chinese: 金剛上師, pinyin: jīngāng shàngshī) is a Vajrayana Buddhist master, guru or priest. It is a general term for a tantric master in Vajrayana and Mahayana Buddhist traditions, including Tibetan Buddhism, Chinese Esoteric Buddhism, Chan Buddhism, Shingon, Bhutanese Buddhism, Newar Buddhism.

Vajrapāṇi (Sanskrit; Pali: Vajirapāṇi, 'holder of the thunderbolt', lit. meaning, "Vajra in [his] hand") is one of the earliest-appearing bodhisattvas in Mahayana Buddhism. He is the protector and guide of Gautama Buddha and rose to symbolize the Buddha's power.

Vajrapāni is also called Chana Dorji and Chador and extensively represented in Buddhist iconography as one of the earliest three protective deities or bodhisattvas surrounding the Buddha. Each of them symbolizes one of the Buddha's virtues: Manjushri manifests all the Buddhas' wisdom, Avalokiteśvara manifests all the Buddhas' immense compassion, and Vajrapāni protects Buddha and manifests all the Buddhas' power as well as the power of all five tathāgatas (Buddhahood of the rank of Buddha).

Vishvakarma or Vishvakarman (Sanskrit: विश्वकर्मा, lit. 'all maker', IAST: Viśvakarmā) is a craftsman deity and the divine architect of the devas in contemporary Hinduism. In the early texts, the craftsman deity was known as Tvastar and the word "Vishvakarma" was originally used as an epithet for any powerful deity. However, in many later traditions, Vishvakarma became the name of the craftsman god.

Vishvakarma crafted all of the chariots of the devas and weapons including the Vajra of the god Indra. Vishvakarma was related to the sun god Surya through his daughter Sanjna. According to the legend, when Sanjna left her house due to Surya's energy, Vishvakarma reduced the energy and created various other weapons using it. Vishvakarma also built various cities like Lanka, Dvaraka, and Indraprastha. According to the epic Ramayana, the vanara (forest-man or monkey) Nala was the son of Vishvakarma, created to aid the avatar Rama.

A kartika or drigug (Sanskrit: kartari; Tibetan: གྲི་གུག་, Wylie: gri-gug, or kartrika in Nepal) is a small, crescent-shaped, hand-held ritual flaying knife used in the tantric ceremonies of Vajrayana Buddhism. The kartari is said to be "one of the quintessential attributes of the wrathful Tantric deities." It is commonly known as the "knife of the dakinis." Its shape is similar to the Inuit ulu or woman's knife, which is used for many things including cleaning skins.

While the kartika is normally held in the right hand of a dakini in Vajrayana iconography and spiritual practice, occasionally it can be seen being held by esoteric male deities, such as certain forms of Yamantaka. It is also found frequently in the iconography of the Tibetan Buddhist spiritual practice of Chöd.