The Secret Doctrine
The Secret Doctrine, the magnum opus of Madame Blavatsky, is a comprehensive survey of the origin of the cosmos and the prehistory of humanity. This synthesis of Science, Religion and Philosophy in the light of the Ancient Wisdom, deals with the unity of existence, periodicity of manifestation and the identity of all souls with the Universal Oversoul, and man's obligatory pilgrimage in accordance with cyclic and karmic laws.