Sacred Words
There are practices that for every magician must be kept subrosa or private. Certain rites, rituals, prayers, incantations, are not meant for the exoteric (the masses). Some are not even meant for the esoteric (the few). Some are only meant for you. This is why I encourage practitioners to keep their tools and altars sacred and private. Because there is power in retaining something for your own use and keeping it from the hands of others.