“Gematria is one of the rules for interpreting the Torah, and is partially a high-level system of numerology.
It is defined by Scholem as, “explaining a word or group of words according to the numerical value of the letters, or of substituting other letters of the alphabet for them in accordance with a set system. All Hebrew letters are equally values and words, so for example the letter Aleph, signifying “A,” also means “one,” as well as being a word meaning ‘ox.'” The table given lists the major values and meanings of the twenty-two letters. This allows the letters to be taken as symbols expressing differing aspects of the Universe, either as separate entities, or when combined together in words.”
“Although some Kabbalists denied the use of Gematria as relevant, other workers such as Abulafia dealt with Gematria so deeply that their works need “decoding” rather than reading. It is said that the Torah is likewise written, and that “mistakes” in the original Greek and Hebrew texts are not mistakes, but rather spellings and variations necessary to ensure the numbers underlying them were correct.”
–Frater FP, The Magician’s Kabbalah, pg. 81.