Diya (lamp) in the context of "Swastika"

Agni (Sanskrit: अग्नि [ˈɐgni], meaning 'fire'), also called Agni Deva ('fire deity'), is the Hindu god of fire. As the guardian deity of the southeast direction, he is typically found in southeast corners of Hindu temples. In the classical cosmology of Hinduism, fire (Agni) is one of the five inert impermanent elements (Pañcabhūtá) along with sky (Ākāśa), water (Apas), air (Vāyu) and earth (Pṛthvī), the five combining to form the empirically perceived material existence (Prakṛti).

In the Vedas, Agni is a major and most invoked god along with Indra and Soma. Agni is considered the mouth of the gods and goddesses and the medium that conveys offerings to them in a homa (votive ritual). He is conceptualized in ancient Hindu texts to exist at three levels, on earth as fire, in the atmosphere as lightning, and in the sky as the sun. This triple presence accords him as the messenger between the deities and humans in the Vedic scriptures. The relative importance of Agni declined in the post-Vedic era, as he was internalised and his identity evolved to metaphorically represent all transformative energy and knowledge in the Upanishads and later Hindu literature. Agni remains an integral part of Hindu traditions, such as being the central witness of the rite-of-passage ritual in traditional Hindu weddings called Saptapadi (seven steps and mutual vows), in the Upanayana ceremony of rite of passage, as well being part of the diyā (lamp) in festivals such as Deepavali and Arti in Puja.

Devotional objects (also, devotional articles, devotional souvenirs, devotional artifacts) are religious souvenirs (figurines, pictures, votive candles, books, amulets, and others), owned and carried by the religious, who see them as imbued with spiritual values, and use them for votive offering. Production and sales of devotional articles have become a widespread industry in the vicinity of various religious sites all over the world.

Devotional articles have a long history; in Christianity they have been mentioned in historical works such as those related to Paul the Apostle and in older religions they have been traced as far back as the times of ancient Egypt and ancient Mesopotamia. International law defines "devotional articles" as including "the Bible, the Koran, prayer and service books, hymnals, ritual articles, sacramental wine, crucifixes and rosaries". Such items may be natural and hardly processed (such as earth from the Holy Land), but majority of modern devotional articles are mass-produced (strips of paper with prayers, pictures of holy figures, prayer books, etc.) Such items are usually seen as having little artistic value, as their primary function is not decorative but spiritual. In Hinduism, devotional articles include the japamala (prayer beads), diyas (oil lamps), kalashas (metal pots), incense sticks, plants such as tulasi, and conches.

A votive candle or prayer candle is a small candle, typically white or beeswax yellow, intended to be burnt as a votive offering in an act of Christian prayer, especially within the Anglican, Lutheran, and Roman Catholic Christian denominations, among others. In Christianity, votive candles are commonplace in many churches, as well as home altars, and symbolize the "prayers the worshipper is offering for him or herself, or for other people." The size of a votive candle is often two inches tall by one and a half inches diameter, although other votive candles can be significantly taller and wider. In other religions, such as Hinduism and Buddhism, similar offerings exist, which include diyas and butter lamps.