Drugs and Brother(s) of the Shadow.

A term given in occultism and especially in modern esotericism to individuals, whether men or women, who follow the path of the shadows, the left-hand path. The term "shadow" is a technical expression and signifies more than appears on the surface: i.e., the expression is not to be understood of individuals who live in actual physical obscurity or actual physical shadows, which literalism would be simply absurd; but applies to those who follow the path of matter, which from time immemorial in the esoteric schools in both Orient and Occident has frequently been called shadow or shadows. The term originally arose, without doubt, in the philosophical conception of the word maya, for in early Oriental esotericism maya, and more especially maha-maya, was a term applied in one of its many philosophical meanings to that which was contrary to and, indeed, in one sense a reflection of, light. Just as spirit may be considered to be pure energy, and matter, although essentially crystallized spirit, may be looked upon as the shadow world or vehicular world in which the energy or spirit or pure light works, just so is maya, as the garment or expression or sakti of the divine energy, the vehicle or shadow of the divine side of nature, in other words its negative or nether pole, as light is the upper or positive pole.

The Brothers of the Shadow are therefore those who, being essentially of the nature of matter, instinctively choose and follow the path along which they are most strongly drawn, that is, the path of matter or of the shadows. When it is recollected that matter is but a generalizing term, and that what this term comprises actually includes an almost infinite number of degrees of increasing ethereality from the grossest physical substance, or absolute matter, up to the most ethereal or spiritualized substance, we immediately see the subtle logic of this technical term b shadows or, more fully, the Path of the Shadows, hence the Brothers of the Shadow.

They are the so-called black magicians of the Occident, and stand in sharp and notable contrast with the white magicians or the Sons of Light who follow the pathway of self-renunciation, self-sacrifice, self-conquest, perfect self-control, and an expansion of the heart and mind and consciousness in love and service for all that lives. (See also Right-hand Path)

The existence and aims of the Brothers of the Shadow are essentially selfish. It is commonly, but erroneously, supposed that the Brothers of the Shadow are men and women always of unpleasant or displeasing personal appearance, and no greater error than this could possibly be made. Multitudes of human beings are unconsciously treading the path of the shadows and, in comparison with these multitudes, it is relatively only a few who self-consciously lead and guide with subtle and nefast intelligence this army of unsuspecting victims of maya. The Brothers of the Shadow are often highly intellectual men and women, frequently individuals with apparent great personal charm, and to the ordinary observer, judging from their conversation and daily works, are fully as well able to "quote scripture" as are the Angels of Light!

Source: https://www.theosociety.org/pasadena/ocglos/og-bc.htm