—If a person calls into exercise, in perfection, holy zeal and austerities, and purifies his heart from the defilement of blamable affections, and then sits down in a retired spot, abandons the use of his external senses, and occupies himself with calling out “O God! O God!” his heart will come into harmony with the visible world, he will no longer receive notices from the material world, and nothing will be present in his heart but the exalted God. In this revelation of the invisible world, the windows of the heart are opened, and what others may have seen in a dream, he in this state sees in reality. The spirits of angels and prophets are manifested to him and he holds intercourse with them. The hidden things of the earth and heaven are uncovered to him. * * * Probably the knowledge of all the prophets was obtained in this way, for it was not obtained by learning. —When the heart is free from worldly lusts, from the animosities of society and from distractions by the senses, the vision of God is possible. And this course is adopted by the Mystics. It is also the path followed by the prophets. —The heart of man while in the spiritual world knows its Maker and Creator: it had mingled with the angels and knows for what service it was created. —To whomsoever this revelation has been vouchsafed, if it directs him to reform the world, to invite the nations to turn to God, and to a peculiar way of life, that person is called a prophet, and his way of life is called a law; and that influence which proceeds from him, which transcends what is ordinary, is called a _miracle_. If he has not been appointed to invite nations, but worships in accordance with the law of another, he is called a _saint_, and that which proceeds from him, which transcends what is ordinary, is called a _manifestation of grace_. —The knowledge of God, which is the occasion of the revelation of truth, cannot be acquired without self-denial and effort. Unless a man has reached perfection and the rank of a Superior, nothing will be revealed to him, except in cases of special divine grace and merciful providence, and this occurs very rarely. —You have now learned, O student of the divine mysteries, the dignity of the heart through knowledge. —Now listen to the heart’s dignity through divine power and the greatness of which it is capable.