As the Jewish people leave Egypt in this week's parsha, they are given the mitzvah of tefillin as a commemoration and memorial of the leaving of Egypt. It used to be that people wore tefillin all day long, but as it became more difficult to keep a clean body the whole day, the amount of time people wore tefillin was reduced to just shacharis. What is important to understand, however, is that tefillin and praying are not really connected...