Needed a Nap

I found this paragraph in a talk given by President Monson at the General Relief Society Meeting in October. (Text, Audio, Video)
"I learned recently of loving service given to a mother when her children were very young. Frequently she would be up in the middle of the night tending to the needs of her little ones, as mothers do. Often her friend and neighbor across the street would come over the next day and say, 'I saw your lights on in the middle of the night and know you were up with the children. I’m going to take them to my house for a couple of hours while you take a nap.' Said this grateful mother: 'I was so thankful for her welcome offer, it wasn’t until this had happened many times that I realized if she had seen my lights on in the middle of the night, she was up with one of her children as well and needed a nap just as much as I did. She taught me a great lesson, and I’ve since tried to be as observant as she was in looking for opportunities to serve others.'”