The language of The Zohar remedies the soul, even when one does not understand what it says at all. It is similar to one who enters a perfumery; even when he does not take a thing, he still absorbs the fragrance.
Rabbi Moshe Chaim Ephraim of Sudilkov,
Degel Machaneh Ephraim [The Banner of the Camp of Ephraim], Excerpts
One who was not rewarded with understanding The Zohar should read nonetheless, for the words can purify the soul and illuminate it with wondrous brightness.
The prayer book of Rabbi Shabtai Rashkovar, “Order of the Study,” p 17
The study of The Zohar is great completeness for the soul. And even when one does not understand, the words of The Zohar alone are very able.
Rabbi Hanoch Hanich of Alsek,
The Order of the Study, Item 2
One who engages extensively should dedicate the majority of his studies in The Zohar even though he does not understand, for why should he care if he does not understand if it is Segula [special cure] in any case?
Rabbi Schneier Zalman of Laddi,
Short Essays of the Old ADMOR, p 571
It is true that we accept that even for one who knows nothing, the words of The Zohar can still cleanse the soul.
Rav Tzvi Elimelech Shapira (MAHARTZA),
The MAHARTZA Additions, Item 9
Since the time the precious light of the two great lights, The Book of Corrections and The Book of Zohar has shone, the Jews, the congregation of Israel, have taken it upon themselves to maintain the sacred study of the corrections and The Zohar, alone and with others, young and old. And although they are unable to attain and to understand the meaning of the pure sayings in these holy books, nevertheless, they drink their words with thirst and read with great enthusiasm.
Rabbi Yosef Chaim of Bagdad,
The Son of the Living Man, Benaiahu, introduction
The study of The Book of Zohar is very sublime to purify and sanctify the soul. Even if one does not know what he is saying and errs in it many times, it counts before the Creator, as it is written, “And his banner over me is love.” Our sages interpreted, “And his skip over me is love.”
What is this like? It is like a little baby who knows nothing and speaks half words with a stammering language, and his father and mother laugh with him and rejoice at his voice. So is the One who dwells above: He laughs and rejoices when the Israeli man is fond of the Torah and wishes to study, yet his mind does not attain or he has none to teach him, and he learns when he knows. He certainly brings contentment to his Maker and receives his reward. Thus, there is no room for excuses for one who does not know how to study; this argument does not exempt him on judgment day, for he could learn as he knew.
Rabbi Eliezer Bar Yitzhak Pappo,
Wonderful Counselor, entry: Zohar
Who can say the great sanctity of The Book of Zohar and its benefit, whose words are hidden and concealed as burning torches, illuminating and shining. Opener of eyes, the origin of life, the life of the souls, its contents is unbroken love, its words excite the hearts to love and to fear the honorable and terrible Lord. And even one who does not understand the internal content of its words, any palate that tastes and learns its language, its words are able for the soul: to illuminate it and to purify it.
Introduction of the Amsterdam Courthouse publication of The Book of Zohar, 1804
We heard explicitly from the Old Admor in Liazni that there is dumbness of the mind, etc., and that reading of The Book of Zohar is good for that, even when he does not know what it is saying.
Rav Yitzhak, Isaac HaLevi Epstein of Hamil,
Ariel Has Camped, Exodus, p 64