This work by Michael Maier (1568/69-1622) was first published in 1617. He answers to the doubts as to the existence of the Order of the Rose Cross - an esoterical, philosophical and mystical Brotherhood, the existence of which was first revealed to the public through the Fama Fraternitatis (Kassel, 1614) and the Confessio Fraternitatis (Kassel, 1615) - and to the attacks against it made by various kinds of people the character and the "reasons" of whom are described by Maier who answers to the doubts made toward the truthfulness of what this Order seemed to have falsely promised, because the Order did not always answered to all the candidates. Why ? Because it choosed the fittest ones according to the fittest ones. This doing he describes the why and how of the existence of said Order the twenty chapters of his book of which chapters here is the list (abridged) : -1- Proof that the Nature Mysteries reveal themselves, are not deeply studied, unveil themselves by their effects, witnesses of their cause -2- That the Nature's secrets are remarkable as stated in the "Confessio Fraternitatis" -3- After the knowledge of the Divine knowledge of the Supreme Good, the universal medecine is what is best considered in Germany among the secrets of the R.C. Society -4- Proof that this cordial medecine is hidden in Nature -5- In past times there also existed philosophical Brotherhoods, Colleges and Societies in other people and nations, exercising the Nature's Mysteries and that universal medecine they transmitted orally... -64- It's not incredible that such a College and Brotherhood exist now and reveals itself through writings and acts -7- Every time it revealed its existence that Society and College has always been deeply appreciated for its reverence toward God and the good it has done and does to the men - 8- It could not reveal itself in Germany otherwise than by publishing its Fama and Confessio -9- Nothing in the booklet ("Silentium...) is contrary to the reason, to the Nature, to the experience, or that would not be possible thhings - 10- Few among the candidates, are, for legitimate reasons, accepted -11- The silence, discretion and secret are observed within the Fraternity, as they were among the Egyptians and the Pythagoricians, so that the Nature's secrets be not revealed to the unworthy --- To be continued ---