Tirukkural 421: Fortress of Wisdom

Wisdom is a weapon to ward off destruction; it is an inner fortress which enemies cannot destroy.

Image of Satguru Sivaya Subramuniyaswami
So loved is Siva-Shakti that all have an intimate relationship. So vast is His vastness, so over-powering is He that men cringe to transgress His will. So talked of is He that His name is on the lips of everyone--for He is the primal sound.
—Gurudeva