The central tenets of Theosophia are not derived from any ancient or modern sect but represent the accumulated wisdom of the ages, the unrecorded inheritance of humanity. Its vast scheme of cosmic and human evolution furnishes all true seekers with the symbolic alphabet necessary to interpret their recurrent visions as well as the universal framework and metaphysical vocabulary, drawn from many mystics and seers, which enable them to communicate their own intuitive perceptions. All authentic mystical writings are enriched by the alchemical flavour of Theosophical thought. Theosophy is an integrated system of fundamental verities taught by Initiates and Adepts across millennia. It is the Philosophia Perennis, the philosophy of human perfectibility, the science of spirituality and the religion of responsibility. It is the primeval fount of myriad religious systems as well as the hidden essence and esoteric wisdom of each. Man, an immortal monad, has been able to preserve this sacred heritage through the sacrificial efforts of enlightened and compassionate individuals, or Bodhisattvas, who constitute an ancient Brotherhood. They quietly assist in the ethical evolution and spiritual development of the whole of humanity. Theosophia is Divine Wisdom, transmitted and verified over aeons by the sages who belong to this secret Brotherhood.