Tefillin are usually thought of as coming in sets, one for the hand (shel yad) and one for the head (shel rosh). But is there any reason two sets can't be mixed and matched? May one wear tefillin ...
May a non-Jew or a person who is in the conversion process don tefillin? If not, what are the reasons that they cannot?
Background While on vacation recently, I was walking down the street with a newly acquainted co-traveler, when we were approached by a young Lubavitch Yeshivah student encouraging Jewish men to lay ...
I heard that the Bet HaLevi and the Peri Megadim hold that there is no Mitzva for a person to don Tefilin everyday. Can someone source these opinions and explain exactly what they are meaning to say?