We often regret passing away of our near ones. And just write in our whatsapp RIP, in most cases; sometimes we send some condolence message.
It is possible that, we might not have got time to meet them in near past. We get engrossed in pursuit of our goals, that we often miss such opportunities to see and meet our own near ones, with whom we might have spent many happier days and even months. Only when such a soul leaves us for ever, we realise how much we miss them. This is life's one of the real vagaries.
