A smile is so powerful - and it is amazing how he continues to share it for surely if he wanted to, he could find something to be grumpy about.

And your second lesson, I find people who live their lives focused on others are in a happier place.

Sorry, you did not get to know your grandparents or at least in happier times, but the Universe brought along some "experienced' folks and the best part is, you saw and you learnt :D