New Delhi, May 21 -- This Japanese proverb lands like a warning from someone who has already paid the price. It does not lecture. It does not explain at length. It simply states what experience has confirmed across centuries and cultures. The mouth, the very instrument of connection, expression and relationship, is also the thing most likely to destroy you.

The image is stark and unforgiving. Not the hand that acts. Not the mind that plans. The mouth. The place where words form and leave. The place where secrets escape. The place where anger finds its sharpest edge. The proverb points directly at the organ of speech and says: This is where disaster begins.

It is one of the oldest warnings in the literature of human wisdom. Versions of i...