There is a more scientific and still greater mystery in the word. It is not only what the word means, it is not only who has said the word, but the word in itself has also a dynamic power. The mystics, sages and seekers of all ages, knowing the mystery of the sacred word, have always been in pursuit of it. The whole meditative life of the Sufis is built upon the mystery of the word. For the word "Sufi", according to the explanation of the initiates, is related to sophia which means wisdom. But not wisdom in the outer sense of the word, because worldly cleverness cannot be called wisdom. The intellect which man very often confuses with wisdom is only an illusion of it. Wisdom is that which is learned from within; intellect is that which is acquired from without. The source of wisdom is above, the source of intellect is below, and therefore it is not the same method, it is not the same process which one adopts in order to attain wisdom, as that which one adopts to acquire intellect. In short, the attainment of that wisdom is achieved in various ways by various people, but the great mystery of attaining divine wisdom lies in the mystery of the word.