Kitáb-i-Íqán 66

From all that We have stated it hath become clear and manifest that before the revelation of each of the Mirrors reflecting the divine Essence, the signs heralding their advent must needs be revealed in the visible heaven as well as in the invisible, wherein is the seat of the sun of knowledge, of the moon of wisdom, and of the stars of understanding and utterance. The sign of the invisible heaven must needs be revealed in the person of that perfect man who, before each Manifestation appeareth, educateth, and prepareth the souls of men for the advent of the divine Luminary, the Light of the unity of God amongst men.

And now, with reference to His words: "And then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory." These words signify that in those days men will lament the loss of the Sun of the divine beauty, of the Moon of knowledge, and of the Stars of divine wisdom. Thereupon, they will behold the countenance of the promised One, the adored Beauty, descending from heaven and riding upon the clouds. By this is meant that the divine Beauty will be made manifest from the heaven of the will of God,