(33) In the rare treatise The Secret Symbols of The Rosicrucians, Franz Hartmann defines the sun alchemically as: "The symbol of Wisdom. The Centre of Power or Heart of things. The Sun is a centre of energy and a storehouse of power. Each living being contains within itself a centre of life, which may grow to be a Sun. In the heart of the regenerated, the divine power, stimulated by the Light of the Logos, grows into a Sun which illuminates his mind." In a note, the same author amplifies his description by adding: "The terrestrial sun is the image or reflection of the invisible celestial sun; the former is in the realm of Spirit what the latter is in the realm of Matter; but the latter receives its power from the former."

(19) And the Light of the Sun is as it were a God in the Nature of this World, and by its Virtue [and Influence] it continually kindles the Stars [or Constellations] whereby the Stars [or Constellations] (which are of a very terrible and anguishing Essence) continually exult in Triumph very joyfully. For it [the Sun] is an Essence like the Light of God, which kindles and enlightens the dark Mind of the Father, from whence, by the Light, there arises the divine Joy in the Father.

(29) For the Stars themselves are senseless, and have no Knowledge or Perception, yet their soft Operation in the Water makes a seething, flowing forth, or boiling up one of another, and in the Tincture of the Blood, they cause a Rising, Seeing, Feeling, Hearing, and Tasting. Therefore consider from whence the Tincture proceeds, wherein the noble Life springs up, that thus becomes sweet from Harshness, Bitterness, and Fire, and you shall certainly find no other Cause of it than the Light: But whence comes the Light, that it can shine in a dark Body? If you say it comes from the Light of the Sun. Then what shines in the Night, and enlightens your Senses and Understanding so, that though your Eyes are shut, you perceive and know what you do? Here you will say, the noble Mind leads you, and it is true. But whence has the Mind its Original? You will say, the Senses make the Mind stirring; and that is also true. But whence come they both? What is their Birth or Off- spring? Why is it not so with the Beasts?

(22) Now the Sun and the Stars [or Constellations] continually kindle the Tincture, for it is fiery; and the Tincture kindles the Body, with the Matrix of the Water, so that they are always boiling, [rising] and seething. The Stars [or Constellations] and the Sun are the Fire of the Tincture, and the Tincture is the Fire of the Body, and so all are seething. And therefore when the Sun is underneath, so that its Beams [or Shining] is no more [upon a Thing,] then the Tincture is weaker, for it has no Kindling from the Virtue of the Sun. And although the Virtue of the Stars and the quality are kindled from the Sun, yet all is too little, and so it becomes feeble, [or as it were dead.] And when the Tincture is feeble, then the Virtue in the Blood (which is the Tincture) is wholly weak, and sinks into a sweet Rest, as it were dead or overcome.