Every thing and institution we see around us, created by human agency, had first to exist as a thought in some human mind. Thought therefore is constructive. Human thought is the spiritual power of the cosmos operating through its creature, man. 'The Master Key' instructs the reader how to use that power, and use it both constructively and creatively. The things and conditions we desire to become realities we must first create in thought.

'The Master Key' explains and guides the process.