From Kurt Vonnegut's "Knowing What's Nice" article in "In These Times" magazine:
"A woman was about to have a baby, not mine, and wished to know if it was a bad thing to bring such a sweet and innocent creature into a world as bad as this one is. I replied that what made being alive almost worthwhile for me, besides music, was all the saints I met, who could be anywhere. By saints I meant people who behaved decently in a strikingly indecent society. Perhaps some of you are or will become saints for her child to meet.

And now I want to tell you about my late Uncle Alex. He was my father’s kid brother, a childless graduate of Harvard who was an honest life insurance salesman in Indianapolis. He was well-read and wise. And his principal complaint about other human beings was that they so seldom noticed it when they were happy. So when we were drinking lemonade under an apple tree in the summer, say, and talking lazily about this and that, almost buzzing like honeybees, Uncle Alex would suddenly interrupt the agreeable blather to exclaim, “If this isn’t nice, I don’t know what is.”

So I do the same now, and so do my kids and grandkids. And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, “If this isn’t nice, I don’t know what is.”

That’s one favor I’ve asked of you.

Now I’ve got another one, a show of hands. How many of you have had a teacher at any point in your entire education who made you happier to be alive, prouder to be alive than you had previously believed possible? Now please say the name of that teacher out loud to someone sitting or standing near you.

OK? All done? “If this isn’t nice, I don’t know what is.”