what is the hermetic significance of the number seven in craft masonry according to the older writers

In early Craft instructions, the requirement of seven brethren to make a lodge perfect was explained simply by reference to the seven liberal arts and sciences 1. Masonic writers note that numbers in Craft Masonry function purely as symbols representing specific ideas rather than possessing magical or supernatural virtue 1.

Regarding wider mystical or hermetic associations, writers recorded several classical and esoteric parallels. Pythagorean tradition viewed seven as a perfect and "virgin" number composed of the triangle (three) and the square (four) 1. Historical accounts also linked the number to the seven ancient planets, corresponding metals, and the musical scale 1.

However, Craft Masonry itself did not adopt these occult systems 1. The monitorial lectures outlining symbolic numbers such as three, five, and seven were framed by Christian ritualists like William Preston, to whom occult numerology was abhorrent 1. The Craft's use of seven remains tied to its historical legend of the liberal arts and geometric symbolism rather than hermetic magic 1.

The requirement that seven brethren are necessary to make a lodge perfect appears in the earliest ritual instructions of the eighteenth century 1. The only explanation provided within those early ceremonies for the significance of the number was its reference to the seven liberal arts and sciences, which the old Legend of the Craft held to be the foundation of Freemasonry 1.

While modern ritualism has largely transferred the explicit explanation of the number seven to the Second Degree in connection with the Winding Stairs, the rule requiring seven to make a lodge perfect originates in these early eighteenth-century catechisms and their link to medieval traditions of liberal learning 1.