wrapping your arm in a chunk of cattle

This article, actually just some excerpts from it, make me all warm and fuzzy inside...

especially this paragraph: Just think how many heads of cows had to roll to make enough parchment for one sefer torah - and though a mezzuzah uses only a sliver, multiply that by millions of doors in Jewish homes around the world. And whoever puts on tefillin (phylacteries) every morning, is literally wrapping around his arm a nice big chunk of cow.