The Secret Doctrine is Madame Blavatsky's masterpiece and something of a succes de scandale. The book sold relatively poorly and yet its influence was profound in diverse areas of cultural endeavour in the Twentieth Century. Although the book never quite found a large audience or widespread acceptance luminaries such as Yeats, Eliot, Kandinsky and HP Lovecraft (to name but a few) all drew inspiration from it. Theosophy was one of those great ideas whose time never quite came, even though it did have an important (and often unacknowledged role) in issues as diverse as Indian independence, women's rights and the struggle for better social conditions. The book has long attracted controversy: allegations of plagiarism and implied racism are just two charges levelled at it. And yet, it is undoubtedly a spiritual classic with many influential admirers from Rudolf Steiner onwards. Many-if not nearly all- modern 'spiritual' movements begin with The Secret Doctrine.
In summary, the book is vast: It tells the story of the creation and evolution of universe in part one 'Cosmogenesis'; while part two details the spiritual evolution of mankind 'Anthropogenesis.' The book also expounds the idea that not only that all religions are one but also that they all contain esoteric wisdom which has either been suppressed or forgotten. Both parts of the book comprise of an extended commentary upon an ancient mystical text called the Book of Dyzan written in a hitherto unknown language: Senzar. The book draws heavily on Hindu and Buddhist cosmology and Blavatsky is one of the first western writers to do this. Out of a huge range of disparate sources from Greece, Eygpt, the Zohar etc. Blavatsky constructs a mythos so elaborate that one feels that she could have given JRR Tolkien a run for his money.
The Secret Doctrine is, in some respects, a feminist classic -whatever view you may hold about the text's veracity. Here is a woman, living in a still patriarchal age willing to take on all male authority figures: Darwin, the Church and assert that fundamentally they are all wrong (or at the very most only part right). How much of this book is meant to be taken as literally true is anyone's guess; however, you have to admire Blavatsky's chutzpah, whether you believe in ascended masters or not.