So there I was, standing at the counter of the post office making mouth noises to the clerk. I made disparaging comments about sending out bills. Harmless enough. Everyone hates doing the bills, right?
She pointed out, very kindly, that I was fortunate to have money to send off. Furthermore, I was fortunate to have the things that needed paying for: home, heat, clean water, electricity, and so on.
To this day, I think of her comments every time I pay bills.
Year of the Horse stamp, USPS
Along the same lines: How to Be Thankful For Your Life by Changing Just One Word. Thanks to ZooLN for posting this link.