Tirukkural 93: The Utterance of Pleasant Words

Sweet speech, flowing from the heart (uttered) with a cheerful countenance and a sweet look, is true virtue

Image of Satguru Sivaya Subramuniyaswami
Among the most intimate, personal forms of communication is the written prayer to the devas or to God. Burned in Agni's sacred fire, it disintegrates in the physical world and quickly re-forms in the astral world.
—Gurudeva