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
Attachment, for instance, holds our cells together; it is also the root of much suffering, for attachment to material objects or people keeps man's awareness externalized, incapable of expressing itself in full freedom.
—Gurudeva