Answer: They are very different. The written language is much higher than the spoken language. It also appeared much later. It is a language that expresses the spiritual attainments of the person who writes and not his feelings. This is the reason that it differs from the spoken language by which a person conveys his feelings, intonations, expressions, sighs, and so on.
There are five groups of letters in Hebrew: guttural, palatal, of the tongue, of the jaws, and of the teeth. When using texts, all this disappears and the groups of letters are classified differently: the first nine letters stem from the Sefirot of the lower seven of Bina, the next nine letters stem from the Sefirot Zeir Anpin, and the last four stem from the Sefira of Malchut. There are five more letters, the final letters MaNTZePaCH, altogether 27 letters.
This is a totally different tool and a different form of expression of the same forces that are conveyed by sounds.
In addition to transmission of vocal information or written information from one person to another, there is another way of conveying information, substantive transfer, that is not used today. It was used during the time of the Temple when people also communicated by offering sacrifices, which is a totally different language.
Comment: There is a complementation of the letters in Hebrew in the form of vowel marks under the letters or markings in the shape of crowns above them, which indicate where one should put the stress and help a person read the words correctly.
Answer: All the languages lose their basis since they don’t fully convey all the information of a letter or a word, but in Hebrew it is not so.
In Hebrew all the letters are consonants with vowel marks below them which indicate the missing vowels in the written language. There are also different signs above the letters in the shape of crowns which convey forms of musical notes so you can convey everything by such an illustration of information.
In Hebrew there are also many marks inside the letters, beside the letters, and between the letters. They are the subtext that is not conveyed by sounds but by a pause in tone, by raising or lowering the tone of speech. The overt text is the notes and the covert text are the signs, which convey a second layer of information that is the subtext.
Today, however, we don’t use all these signs because the consonants are enough for a person who is used to the language.
From the Kabbalah Lesson in Russian 7/24/16