The Master-Key: A New Philosophy (1914) is a book written by David Blair. It is a philosophical work that explores the concept of the ""master-key"" and its role in unlocking the potential of the human mind. The book argues that the key to unlocking this potential lies in understanding the power of the mind and its ability to shape reality. Blair draws on a variety of sources, including Eastern philosophy, psychology, and metaphysics, to develop his...