Don't know what you've missed till it's gone

We often take things for granted, and people too. Say goodbye one moment and funeral the next. The recent Singaporean victim in the Mumbai bombing brought about a whole lot of grief and with it uncontrollable tears.
My own father-in-law is lying in a hospital bed right now, battling a confused mind that doctors are still trying to determine its cause for. We saw him two Saturdays back, had dinner at his place and said our goodbyes. The next day, he was found sprawled on the kitchen floor in a pool of blood. We didn't even know how long he had been there or how he fell. He could not relate anything that may yield a clue to what happened. He now sustained two fractured ribs and mumbling incoherently most times.
What can we learn from it in relating with people?
Seize every moment we can to lift that person up. To cheer and to build, to encourage and motivate for this is the lesson of relationship. Every moment of destruction, of tearing down, of belittling leads to life-long degeneration. When was the last time you said something encouraging especially to the person whom you have taken for granted and who may be closest to you?