And as this light of sun and moon and of planets plays the most important part in the life of the world, individually and collectively, so the light of the Spirit of Guidance also divides time into cycles. Each cycle therein has been under the influence of a certain master, with so many controllers of the whole world under him, working as a universal government to control the affairs mostly concerning the spiritual condition of the world inwardly. Numberless have been the masters since the human creation, who appeared in a certain name and form, but He alone was disguised in them Who is the only Master of Eternity.