Tirukkural 193: Against Vain Speaking

That conversation in which a man utters forth useless things will say of him "he is without virtue"

Image of Satguru Sivaya Subramuniyaswami
Purity, devotion, humility and charity are the four keys to good conduct. Of these, purity is the cardinal virtue. We cultivate purity by thinking, speaking and doing only that which is conceived in compassion for all.
—Gurudeva