The Chemical Wedding of Christian Rosenkreutz
It is an allegoric romance (story) divided into Seven Days, or Seven Journeys, like Genesis, and recounts how Christian Rosenkreuz was invited to go to a wonderful castle full of miracles, in order to assist the Chymical Wedding of the king and the queen, that is, the husband and the bride. This manifesto has been a source of inspiration for poets, alchemists (the word "chymical" is an old form of "chemical" and refers to alchemy—for which the 'Sacred Marriage' was the goal)2 and dreamers, through the force of its initiation ritual with processions of tests, purifications, death, resurrection, and ascension and also by its symbolism found since the beginning with the invitation to Rosenkreutz to assist this Royal Wedding.
Alchemy is based on the view that man, as a result of the loss of his original Adamic state, is divided within himself. He regains his integral nature only when the two powers are again reconciled with one another."
-- The Chymical Wedding of Christian Rosenkreutz
The invitation to the royal wedding includes the symbol invented and described by John Dee in his 1564 book, Monas Hieroglyphica.
After so many injuries have been done to the human race, I flow forth, by divine decree and assisted by the Art, as a healing giving medicine. He who is able, drink out of me. He who wants, purify himself in me. He who dares, jump into my depths. Drink, brother, and live.
— Chymische Hochzeit Christiani Rosencreutz (not an authentic quote?)