Letter BodyBet is shaped like a house — open on the left (toward the future, toward creation), closed on three sides. The dot inside (Dagesh) = the divine presence dwelling within the house. The famous question: why does the Torah begin with Bet and not Alef? Because Bet means blessing (Beracha, בְּרָכָה) — God wanted to begin with blessing.
Mystical DepthBereshit — In the beginning — starts with Bet. The Zohar says the Torah's first word contains the entire mystery of creation. Bet = 2 = duality, the first separation. Before Bet there was only Alef — the One. Bet introduces the idea of "other" — and with otherness comes love, because you can only love what is (apparently) other than you.
Sefer YetzirahPlanet: Saturn · Opposites: Wisdom/Folly · Body: Right Eye. Double letters have two sounds (hard Bet = B, soft Bet = V) and represent the dual nature of existence — life/death, peace/war, wisdom/folly.
Arabic Parallel
ب
Ba (ب)
Same letter, same house shape, same sound. In Sufi tradition: the dot beneath Ba = the Bindu, the point of creation. Ali ibn Abi Talib: "All wisdom of the Quran is in the Fatiha — all of the Fatiha is in the Bismillah — all of the Bismillah is in the Ba — and all of the Ba is in its dot."
"Why was the world created with a Bet? Just as Bet is closed on all sides and open in front, so you are not permitted to investigate what is above, what is below, what is before — only from the day of Creation onward."— Jerusalem Talmud, Hagigah 2:1