At the foundation of the ancient mysteries, all the gods were included in the only supreme God. This revelation, including all its consequences, became the key of the Kosmos. This was the reason it was entirely reserved for initiation, properly so called. The novice knew nothing of this, he was only permitted to catch a faint glimpse of this truth from what he was told of the powers of Music and Number. “Numbers,” said the master, “contain the secret of things, and God is universal harmony.” The seven sacred modes, built up on the seven notes of the heptachord, correspond to the seven colours of light, to the seven planets, and to the seven modes of existence reproduced in all the spheres of material and spiritual life from the smallest to the greatest. The melodies of these modes when skilfully fused should tune the soul and make it sufficiently harmonious to vibrate in accord with the accents of truth. With this purification of the soul corresponded of necessity that of the body, which was obtained by means of hygiene and strict moral discipline. The first duty of initiation was to overcome one’s passions. He who has not harmonized his own being cannot reflect divine harmony. And yet the ideal of the Pythagorean life contained nothing of asceticism in it, for marriage was looked upon as sacred. Chastity, however, was recommended to the novices, and moderation to the initiates, as being a source of strength and perfection: “Only yield to voluptuousness when you consent to be less than yourself,” said the master. He added that voluptuousness exists only in itself, comparing it “to the song of the Sirens who disappear when one approaches them, to find in their place nothing but broken bones and bleeding flesh on a wave-beaten rock, whilst true joy is like the concert of the Muses, leaving celestial harmony behind in the soul.” Pythagoras believed in the virtues of the woman initiate, he greatly mistrusted the untrained woman. On a disciple asking him when he might be permitted to approach a woman he replied in ironical accents: “When you are tired of your peace of mind.”