In Buddhism, one of the three poisons at the root of the mind, and at the root of suffering. The Tibetan word zhe-sdang and the Sanskrit dvesa are also interpreted as anger or hatred.
"In these studies of Kabbalah, we need to be practical; there are authors who write marvels, but when one looks at them, one realizes that they have not lived what they have written; they did not experience it in themselves, and that is why they are mistaken. I understand that one must write what one has directly experienced by oneself. I have proceeded in this way for my part."