Sweet Speech?

Allavai theya aram perugum nallavai naadi iniya solin - Thirukkural
If speech be sweet, motivated by good intentions, your vices diminish and virtues flourish - Loose translation
Aha! At last. This is one of Tiru's sayings which vibes with the modern world. Flattery gets you everywhere as we all know. I mean, what earns you more friends on Social Media than 'Likes', 'Shares' and praise in comments, all of which is the modern equivalent of 'sweet speech'? Perhaps, Tiru is not totally outdated, after all.
But...wait! What exactly did the chap mean when he said 'motivated by good intentions'? I mean, yeah, I go wholesale praising people all over facebook and Instagram because I want them to come back to do the same to me. Does that count as 'good intentions' and will that diminish my vices and allow my virtues to flourish?
Knowing Tiru, I am afraid not. The chap probably knocked off flattery with that phrase, counting any intent for back-scratching as a 'bad intention'. For that chap, the only good intentions that would probably count are ones that benefit THAT other guy who is getting praised, or society or some such thing. Really, he is harder taskmaster than any boss of mine ever was.
So, yes, Tiru actually wants me to be a sweet spoken chap for the sake of the happiness of others. Yeah, if I were careful with my words, using them only to benefit others or make them happy, obviously I would really have no bandwidth to indulge in any vices. I mean, come on, is it possible for you to simultaneously want the happiness of the other guy AND stab him in the back? Really, how self-deluded could you be to think that poking around a knife between the shoulder blades is calculated to make him happy?
Got to agree with Tiru there...that WOULD diminish vices and allow virtues to flourish all right. Which of you is aiming for it, now? You can practice it on me.