Devotees of Lord Viṣṇu apply sandalwood paste to their bodies because it is said to be dear to Him.
It is particularly used to apply a sacred religious mark on the body called the Ūrdhva-Puṇḍra.
Reasons for wearing this symbol
This symbol is worn with sandalwood paste; smeared in the same places where one applies scent/deodorant—armpits and hands. It’s a similar idea: using fragrance as a courtesy and sensitivity to others, about our body odor.
Beyond fragrance, sandalwood is dedicated to Lord Viṣṇu. The idea is that each time you notice the sandalwood fragrance on you, you think of Him—a method of devotion that encourages divine remembrance.
This symbol is also applied to two other body parts: the forehead (between the brows) and the heart, a symbolic placement of Him in your head and heart.
Symbolism
Ūrdhva-Puṇḍra consists of three upright vertical lines.
The three lines correspond to the syllables A–U–M, the three sounds that form the Praṇava or Oṃ.
The center one is highlighted because the syllable “U” denotes Lord Viṣṇu.
Sometimes, there’s a dot on the top or an extension at the bottom—both of these denote the combined form: Oṃ.
Spiritual adepts wear just one line—again denoting the combined form: Oṃ.
Ūrdhva-Puṇḍra Mantras
Traditionally, this symbol is applied each day after bathing.
Anyone who’s a Viṣṇu devotee can wear it; no restrictions.
While wearing this Ūrdhva-Puṇḍra symbol, devotees chant one of these mantras:
Praṇava—Simply chanting Oṃ is sufficient for this.
After wearing the symbol, devotees meditate on Viṣṇu at the heart and between the brows.
Viṣṇu devotees refer to these as Chakra Tirtha, religious spots (within the body).
The technical names for these spots are the Heart and Brow Chakras.
This meditation helps channel emotions and build awareness; the two main teachings of Viṣṇu.
Some practitioners also meditate on Viṣṇu at the Crown Chakra, as part of this practice.
Contemplation on Viṣṇu
The word Viṣṇu means “one who pervades.”
In other words, the divine presence permeates the entire cosmos.
Meditating on Viṣṇu reminds us that the pervasive divine exists in everything: you, me, all living beings, and throughout the universe.
This understanding of divine presence in all encourages us to treat others with empathy and respect.
Conclusion
Wearing this symbol becomes a spiritual practice if accompanied by chanting, meditation, and contemplation.
It promotes constant remembrance of Viṣṇu and his teachings.
Over time, this practice helps in developing mindfulness, love for the divine, and compassion for the world, leading us toward peace and self-realization.