Saying The Zohar can purify the heart.
Light of the Upright, “Pure Myrrh”
Always cleave your soul to The Book of Zohar and the writings of our teacher, the Ari. And cleave your soul with fear, love, and humility, lest your aim will be to become a rabbi and a leader, for this is truly idol-worship. Hence, my brothers, my sons, dear souls, sublime and elevated, cleave your souls to The Book of Zohar.
Rav Yitzhak Yehuda Yehiel Safrin of Komarno,
Notzer Hesed [Keeping Mercy], Chapter 4, Teaching 1
He also said that he asked his rav to be saved from pride and constantly pleaded to him about that. He told him “Study The Zohar,” and he replied, “I am studying The Zohar.” And his rav replied, “Study The Zohar a great deal.”
Rav Pinhas Shapira of Kuritz,
Midrash Pinhas, 36, Item 73