Surely you must have heard these words!
பெத்த மனம் பித்து;
பிள்ளை மனம் கல்லு!
The closest to "selfless love" is the love of the parents for their children-
whether they are wise or vicious!
I have seen parents who forgive and forget the mistakes committed by
their offspring who turn out to be thoughtless, selfish to the core, ditch
their parents, deceive them, disturb them, humiliate them and even stab
them at their back while lying innocently on their laps!
True Love is all forgiving! That is why the world goes on!