About the Mystery of the Letters the mid-6th century, in which Mar Saba had played an important role. The anonymous author of the treatise declares he was prompted to the study of the secret meanings of the letters by the words of the Apocalypse, "I am the Alpha and Omega", and that he subsequently received a vision about them on Mount Sinai. The author proposes a re-modelled Greek alphabet reduced to 22 letters on the model of the 22 letters of Hebrew (discounting Xi Ξ and Psi Ψ), and with the Hebrew letter names. He then interprets these letters as symbolic figures of 22 works of
Arabic alphabet Arabic alphabet The Arabic alphabet ( ', or ') or Arabic abjad is the Arabic script as it is codified for writing Arabic. It is written from right to left in a cursive style and includes 28 letters. Most letters have contextual letterforms. Originally, the alphabet was an abjad, with only consonants, but it is now considered an "impure abjad". As with other "abjads", such as the Hebrew alphabet, scribes later devised means of indicating vowel sounds by separate vowel diacritics. The basic Arabic alphabet contains 28 letters. Adaptations of the Arabic script for other languages added and removed some