The ancient school of Pythagoras had three levels of training and the exoteric, called the Outer Court’ the School proper, for the advancing serious and dedicated students; and third, the Inner Court, the “Point of No Return,” for those worthy to enter the Holy of Holies.
Relating this to Man today we learn that every individual in the long journey of evolution can and shold become his own Mystery School.
The steps along this Inner Pathway are through an understanding and actual living of theosophical teachings comprised in the Seven Jewels of Wisdom.