Story: Sakthi Nayanar

Periyapuranam

Sakthi Nayanar (sometimes called Shaktinatha) did not tolerate any one who spoke ill about Shaivas. He is said to have forcibly pull out the tongues of the offender with tongs and cut them off with sharp knife called satti, which gave him his name.

Image of Satguru Sivaya Subramuniyaswami
Remember, your powers of observation are cultivated by abstinence from excessive talk. That is all you have to do to begin with--be more silent and observing, not wasting or dissipating this most vital power.
—Gurudeva