Micha Berger wrote an amazing post about Reb Aryeh Levin on his blog, Aspaqlaria.  It’s worth the visit and is worth printing out.
Here’s a passage that I loved:

Rav Aryeh Levin’s “job” was as a mashgiach at a children’s school, Etz Chaim. That meant not only his formal duties. It meant sharing his food with the boys who couldn’t afford regular lunches. It meant bringing food for his own home for the boys who weren’t eating lunch regularly because they simply didn’t like the fare the school could afford to serve.

There’s also three other posts about Reb Aryeh here.