In my thesis, I have tried to understand better the difference between intelligence as just knowledge or problem-solving, and a different knowledge: wisdom, or spiritual intelligence. To do so, I compared the theories of two great spiritual intellectuals: philosopher and psychiatrist Iain McGilchrist and the medieval mystic Meister Eckhart. I found remarkable similarities between the two accounts, as they both emphasize that spiritual knowing has to do with a learned unknowing, an emptying of our own desires and images and recognizing the limits of our human knowledge. By doing so, we adopt an attitude of this complex notion active passivity or receptivity, in which one becomes attuned to the Other, the spiritual, to God.