A Master-key to the Mysteries of Ancient and Modern Science and Theology.
ALFRED R. WALLACE, co-author with Darwin of the theory of evolution, regarding Isis Unveiled:
“I am amazed at the vast amount of erudition displayed in these handsome volumes and the great interest of the topics on which they treat. Opens a whole world of new ideas and cannot fail to be of the greatest value.”[in a letter to H.P.Blavatsky, Jan. 1, 1878]
WILLIAM STEWART ROSS remarked in The Agnostic Journal of which he was editor:
“Anyone with the capacity to recognize human greatness and to discern the Shekinah light of Genius, could not fail to know that the world held only one Madame Blavatsky. She had that overflow of soul which falls to the lot of few.
… In spite of her tremendous attainments and unrivalled talent, she had not a vestige of pedantic assumption, and had the simple heart of a child. ‘Impostor’ indeed! She was almost the only mortal I have ever met who was not an impostor.” For evidence, he said, “read Isis Unveiled, The Secret Doctrine and The Key to Theosophy.”[The Agnostic Journal]