I have had reason to say this about philosophers, especially philosopher-poets. They have this tendency to exaggerate the specific virtue or vice that they are talking of at the moment. Maybe it is something that is more true of this portion of the world. Like, you know, 'mother of all battles'. So, yeah, at any point in time, whatever we are talking of is the 'greatest virtue' or the 'worst evil' or whatever.
So, Tiru has this to say...
Puththe lulagaththum eendum peralaridhe oppuravin nalla pira - Tirukkural
No greater virtue exists in this world, or in the world of the gods, than benevolence - Loose translation
Yeah, I know, that sounds like a boomer uncle advice. But then Tiru antedates boomers by far, so he has the right to sound even more ancient than them. (I don't really know if benevolence is all that outdated considering that I have seen it in action in as late as the millenials. Though, yes, to be honest, ANY virtue these days seems to be solely expressed by vilifying those seen as bereft of the virtue than by being virtuous yourself.)
But, getting back to Tiru, he sees this attitude of seeking to do good to those around you as the biggest virtue...at least in this kural. Come to think of it, this one thing actually encompasses a whole host of virtues.
Firstly, you need to have empathy. See, Tiru is not talking charity here which can come after help is SOUGHT from you. He is talking benevolence...which does help those who seek help but ALSO sees the needs of others and helps without being sought. That requires empathy. To put yourself in their shoes and do what is needed by them.
Then it requires an element of selflessness. Whatever you give, you need to forego yourself. And, when Tiru places it so high, it is not merely because you would give what you yourself will not miss. It is because you will give even if at some cost to yourself. That willingness to sacrifice is why he exalts it so high.
Quite naturally, you cannot be benevolent while simultaneouly plotting to stab the other guy in the back. THAT would be a very peculiar type of benevolence indeed.
Thus, you see, you will find a multitude of virtues (I am sure you can build up that list for yourself beyond what I have listed) bundled into that single word - benevolence.
Perhaps Tiru was not exaggerating after all.