What Are Tefillin?

The first time a non-Jewish friend saw my husband putting on Torah passages, worn during weekday morning prayers">tefillin, she stared for a good thirty seconds before asking, very carefully, "What are those black boxes?" It is a fair question. If you have never seen Torah passages, worn during weekday morning prayers">tefillin before, the sight of a man wrapping black leather straps around his arm and placing a black box on his forehead is... unexpected. But for Jewish men, this is one of the most fundamental daily mitzvos — a physical binding of Torah to the body, performed every weekday morning for thousands of years.

Tefillin (Hebrew: תפילין, sometimes called "phylacteries" in English, though nobody in the Orthodox world uses that word) are two small black leather boxes, each containing four sections of the Torah written by hand on parchment. They are attached to the body using leather straps — one box on the upper arm (the shel yad), and one on the head (the shel rosh).

What Is Inside?

Each tefillin box contains the same four Torah passages:

1. Shema (Devarim 6:4-9) — "Hear O Israel, Hashem is our G-d, Hashem is One"
2. V'ahavta (Devarim 11:13-21) — the second paragraph of Shema, about reward and consequence
3. Kadesh (Shemos 13:1-10) — about sanctifying the firstborn and remembering the Exodus
4. V'hayah ki yeviacha (Shemos 13:11-16) — continuing the firstborn narrative

In the arm tefillin, all four passages are written on a single piece of parchment. In the head tefillin, each passage is on a separate parchment in a separate compartment — which is why the head tefillin has four distinct sections visible on the outside of the box.

The parchments are written by a trained sofer (scribe) with the same care and precision as a Torah scroll. If a single letter is malformed or missing, the tefillin are invalid. A good pair of tefillin is a significant investment — often hundreds or even thousands of dollars — and they last for many years with proper care.

How Are They Worn?

Tefillin are put on during weekday morning prayers (Shacharis). They are not worn on Shabbat or Yom Tov, since those days are themselves an "ot" (sign) of the covenant, making the additional sign of tefillin unnecessary.

The arm tefillin (shel yad) is placed on the upper arm — the left arm for right-handed people, the right arm for lefties — angled toward the heart. The strap is wound seven times around the forearm (the number and style of windings vary by custom) and then around the hand and fingers.

The head tefillin (shel rosh) is placed on the head, centered above the forehead, at the hairline. It rests right between the eyes — well, above them — sitting just above where the hair begins. The straps hang down in front, over the shoulders.

The order matters: the arm tefillin is put on first, with a bracha, and then the head tefillin. When removing them, the head comes off first. My husband does this every morning — it takes about two minutes — and then he davens Shacharis wrapped in his tallit with his tefillin on.

The Significance

The Torah says: "Bind them as a sign on your hand and as frontlets between your eyes." The arm tefillin, positioned near the heart, represents the devotion of our emotions and actions to Hashem. The head tefillin, positioned on the brain, represents the devotion of our thoughts and intellect. The straps wrapping around the arm and hand symbolize channeling our strength and our deeds toward serving G-d.

There is something profoundly physical about this mitzvah. Judaism is not a religion that lives only in the mind. We do not just think about G-d — we bind His words to our bodies. We wrap leather straps around our arms. We place a box on our heads. The Torah becomes something you can feel pressing against your skin.

mitzvah-milestone">A Bar Mitzvah Milestone

One of the most significant moments in a Jewish boy's life is putting on tefillin for the first time, usually beginning about a month before his bar mitzvah (age 13). My oldest son practiced with his father for weeks before his bar mitzvah. The first morning he put on tefillin "for real" — with the full intention of fulfilling the mitzvah — was emotional for everyone. He stood there, this boy of mine, wrapped in leather and parchment, connected to every Jewish man who had done this same thing going back to Moshe Rabbeinu.

That is what tefillin are. Not strange black boxes. A connection — physical, tangible, daily — between a Jew and his Creator, between this generation and every generation before it.