Kabbalah has a remarkable view of language. The 22 letters of the Hebrew alphabet aren't only symbols for sounds. They're described as channels of energy – the raw building blocks the Creator used to form the universe.
Letters that build worlds
The idea goes back to one of Kabbalah's oldest texts, Sefer Yetzirah (the "Book of Formation"), which describes Creation as a process of engraving, combining and arranging letters. Each letter has its own shape, number and quality. In this view, when letters combine, they create; when they're rearranged, the result changes.
Shape, sound and number
Each Hebrew letter also has a numerical value (Aleph is 1, Bet is 2, and so on), which is the basis of gematria – finding connections between words with the same value. And each has a shape that Kabbalists read as meaningful. Bet (ב), the first letter of the Torah, is closed on three sides and open on one, often read as a hint that we focus on what comes after the beginning, not what came before.
Seeing, not only reading
Rav Berg's school extends this into practice. Because the letters are understood as energy, you don't need to read Hebrew to connect with them – looking at them with intention is itself described as a form of meditation. That idea is the basis for the 72 Names of God and for scanning the Zohar, both of which you'll find in the Daily Tools path.
Three mother letters
Sefer Yetzirah singles out three "mother" letters: Aleph (א), Mem (מ) and Shin (ש), linked to air, water and fire. They're a lovely entry point: write them large, look at them, and notice the difference in their shapes.