The way of attaining spiritual knowledge is quite opposite to the way by which one attains worldly knowledge. As the sky is in the opposite direction to the earth, so the source of knowledge of spiritual things is opposite to the knowledge of the world. As man becomes intellectual, he knows things of the world; but this does not mean that he becomes spiritual; on the contrary, he goes further from spirituality by his thought: "I understand worldly things." What is the best way of attaining spiritual knowledge? First, one must develop in one's nature that little spark which is divine, and which was shining in one's infancy, showing something pure, of Heaven.