It's difficult to know exactly what were truly and uniquely Rosicrucian teachings. We can only make educated guesses from what is available to us about Rosicrucianism. Remember the members of the Rosicrucian Order, if ever one existed, were sworn to secrecy never to reveal who were members of the Order and what were the teachings of the Order. These were to be kept from the eyes and ears of the profane and the unbeliever.
Rosicrucianism has been associated with Qabbalistic teachings. These teachings relate to an understanding of the creator and the universe of creation. Creation is divided into realms, one of which is sometimes described as "The Ocean of Spirit". This is the upper realm or world. The lower realm or world becomes the "astral" light. Between these two are many orders of Spiritual Intelligences represented as Divine Planets. Below the astral realm we have what is described as "The Gathering of the Waters and the Production of teh Virgin Earth.
The Rose and Cross, according to Cagliostro, should be considered the ancient and true symbol of the Mysteries (Hall, p108). This he is supposed to have said at a gathering intended to expalin the Masonic Mysteries according to Egyption Rite at a conference attended by Masons in Paris May 10, 1785.
"By philosophy is to be understood the knowledgeof the workings of Nature,by which knowledge man learns to climb to those higher mountaines above the limitations of sense. By Qabbalism is to be understood the language of the angelic or celestial beings, and he who masters it is able to converse with the messangers of God. On the highest of the mountains is the School of Magia (Divine Magic, which is the language of God) wherein man is taught the true nature of all things by God Himself."
Rosicrucian symbols are thought to have many meanings but the Rosicrucian meaning has probably not yet been revealed. The masters of the order are said to hold out the rose as the remote rpize, but impose the cross on those who enter into a study of their mysteries (cf. Michael Maier, Silentium post Clamores, and de Quincey, The Rosicrucians and the Freemasons) (Hall, p. 144).
Apparently the rose and the cross appear upon the stained glass windows of Lichfield Chapter House, where Walter Conrad Arensberg believes Bacon and his mother to have been buried. The rose and the cross are also to be found as a watermark on the dedication page of the 1628 edition of Rebert Buront's Anatomy of Melancholy (Hall, 144).
The rose and cross are supposed by some to be phallic symbols, or as symbols of the female and male principles of creation, or as representing the postive and negative aspects of all relative being, according to ancient hermetic philosophy. Unfortunately these symbols have sometimes been interpreted as symbols of the human sexual process of creativity. This interpretation probably was responsible for the belief that the Rosicrucians and the Templars practiced obscene rites in their secret ceremonials. The more reasonable explanation seems to be that the Rosicrucians perceived regeneration as the dey to spirituality and for this reason founded their symbolism upon the rose and the cross, which they took to typify the redemption of man through the union of his lower temporal nature with his higher eternal nature.
Sometimes the rose and the cross are represented as a rose on a cross, with the cross sometimes raised on a three-stepped Calvary. Sometimes the rose and cross are represented as a cross within an opened 10-petalled rose. The rose and cross is said to have been drawn upon the Round Table of King Arthur, and the central motif linking the chain of the Order of the Garter, which is suspected as having something to do with the Rosicrucians.
The cross represented within the rose is given various interpretations. The rose has been associated with generation, fecundity, and purity. The unfolding rose could be symbolic of spiritual unfoldment, or that growth in spiritual consciousness is represented as an unfolding of consciousness. The rose by virtue of its red color may be symbolic of the blood of Christ, and the golden heart sometimes concealed withing the the unfolding rose, in which the cross is placed, may correspond to the spiritual gold concealed within human nature. The number 10 is the number the Pythagoreans assigned to perfection. The rose also symbolizes the heart, emblematic of love and compassion, as awell as the nature of Christ, who personified these virtues. The rose is an ancient religious emblam, used by the Greeks as the symbol of the sunrise or the coming of dawn. In the Golden Ass of Apuleius, he is turned to a donkey for his foolishness and restored to human form by eating a sacred rose given to him by the Egyptian priests. The hieroglyphic rose was found upon the escutcheon of Martin Luther, giving rise to the speculation about a possible connection between the Reformation and the acitivities of the Brothers of the Rose Cross (Hall, 139).
Consider the roseates on the apron of a Master Mason. The same roseates can be found on the family crest of Johann Valentin Andreae (Hall, 140). The author of the Confessio Fraternitatis and the Fama Fraternitatis (1615, Frankfort).
The word rose may also be taken simply as an anagram for love, for its letters may be rearranged to form the word eros, for love (Hall, p 79). The rose thus may be regarded a symbol for human and divine affection and compassion.