There are twelve basic active forces and twelve basic passive forces or principles in the universe. According to the scheme of the “Pistis Sophia,” these forces are concentrated in the highest realm of light and conducted by respective entities; each one is a representative or a personification of one active or passive principle. They are all perfect in their own way. The whole universe is penetrated by these forces and an infinite variety and combination of them is possible. In the “Pistis Sophia” the expression “twenty-four invisibles” refers to the principles as well as to the entities. They are invisible in all spheres below the highest realm of light. But in the latter sphere, the principles or forces as well as their personified entities are visible in the form of rays or fine threads running through the atmosphere. They are noticeable not only by various colors and shades, but also by scent and tone and other qualities that are unknown to human sense-perception.