A major treatise on Human Consciousness and the Wisdom Science. Volume 4 is a key which unlocks the reservoir of knowledge and practice contained within the first three volumes. Through the information provided here, the work becomes effective as both a reference work and a teaching manual. The Detailed Contents are a sequential list of headings and subheadings provided to assist the reader in locating material of interest. The Lexicon of the Wisdom Language defines the specialised terms appearing in this work, along with many others in both English and the Sacred Languages. The Index provides the reader with ready access to the full range of subject matter, including the wealth of practical instruction and meditational practices. The work ends with a brief introduction to the Foundation for Higher Learning, an international Spiritual School embodying the principles contained in these volumes.