The offering of incense, the burning of aromatic resins, woods and spices to produce fragrant smoke, is one of the most ancient and widespread of religious acts, used across the traditions to honour the divine, purify sacred space, and carry prayer symbolically upward. The rising smoke has been understood almost universally as an image of prayer ascending to heaven, and its sweet fragrance as an offering pleasing to the divine and as a mark of the holiness of the place and the rite. Incense engages the sense of smell in worship as light engages sight and chant engages hearing, and its distinctive scent marks off sacred occasions from ordinary life.
The practice appears across the religions in characteristic forms. In the worship of ancient Israel, incense was burned on a dedicated altar and formed part of the daily Temple service, and the Psalmist prays that his prayer may rise like incense before God. The Catholic and Orthodox churches use incense in the solemn liturgy, censing the altar, the gospel book, the clergy and the people, and the offering of incense before icons and at funerals; a psalm verse links the rising smoke to prayer. In Hinduism and Buddhism incense sticks are offered before images of deities and buddhas as a standard element of worship, and in the Chinese and East Asian traditions the burning of incense before ancestral tablets and temple altars is a defining religious gesture. Across all these settings the same underlying symbolism recurs, fragrant smoke as honour, as purification, and as the visible ascent of prayer.