This volume explores the nature of consciousness through the theosophical principles of atma, buddhi and manas. It is part of a series of writings, collected under the banner of 'Modern Theosophy', that re-present important texts drawn from the history of the theosophical movement complemented by texts from contemporary authors and innovative thinkers. Pablo Sender was born in Argentina in 1975. A doctor of biosciences, he was drawn to theosophy because he felt, 'it presented a far wider scope of knowledge' than studying science alone. H.P. Blavatsky was a Russian occultist and author, co-founder of the Theosophical Society in New York City with Henry Steel Olcott and William Quan Judge. The Theosophical Society was founded