Destructive speech?

Yaakaavar aayinum naakaakka; Kaavaakkaal sokaappar sollizhukku pattu - Tirukkural Control your tongue even if you control nothing else; Else your ill-said words will come back to bite you - Loose Translation When I first heard the first part of this, I was shocked. I mean, I LIVE for my tongue, for the taste of all sorts of food and this...thankfully, the second part kicked in. The man was