Practical Occultism by H.P. Blavatsky
This work explores foundational principles of occult knowledge and esoteric wisdom. Blavatsky emphasizes spiritual discipline, ethical conduct, and inner transformation as essential for mastering mystical practices, highlighting the importance of moral purity and selflessness in the pursuit of hidden truths.

Helena Petrovna Blavatsky (1831–1891) was a Russian occultist, author, and co-founder of the Theosophical Society. Her works, including The Secret Doctrine, explored esoteric wisdom, spiritual evolution, and ancient mysticism, shaping modern Western esotericism and spiritual movements.