“Well, it is necessary for me to express myself through hints so that if the letter happens to fall, into the depths of the sea or the land, whoever reads it will not understand it... But be careful that these do not fall into the hands of uneducated people. For I almost believe that there are no more laughable theories for the (uninformed) people than these, nor also more admirable and exciting ones for those who possess intelligence. And when they are said many times and continually heard for many years, only then are they cleaned with much care, like gold.

And the admirable part of the matter, listen to see what it is… Therefore you, be careful not to one day regret what has unjustly escaped you. The best protection is for them not to be written but to be learned by heart. For it is impossible for what is written not to fall away. For this reason, I have never written anything on these matters…” Letter II of Plato (314a-b-c)