There's something surprising and touching in unexpected generosity. That's precisely the sort of compassion we see in "Recuerdo": a chance gesture that turns out to have deep meaning for the person on its receiving end. It turns out that your actions have an impact on the people around you – even the strangers you pass on the street. Sure, it's not as world-changing as becoming a U.N. goodwill ambassador. But we can't all be Angelina Jolie. Sometimes handing out a piece of fruit can do just as much good on a small scale.
This is a perfect example of compassion: a sudden, instant choice to help someone less fortunate than the speaker.
For all its beauty, this poem describes one of the problems with charity: the speaker impulsively gives everything to the first person she sees without stopping to consider more pragmatic solutions.