The illusory phantom the mind conjures up, at the very threshold of greatness, is only dissolved if that mind has experienced or made contact with its true essence or spiritual nature. For that to happen the mind must first be motivated by a lofty purpose. In the midst of any great challenge, there is a sustaining force. If the mind cannot draw from that force, it is inevitably drawn into self- pity, then fear, and ultimately defeat or mediocrity. Only the courageous can in humility endure the feelings of loss or failure, and emerge victorious having lost nothing. Again and again this battle is fought until the mind can see the difference between its illusory nature created by its selfishness, and its true and sustaining nature that is discovered through self- sacrifice. The master key refers to the knowledge that unlocks the spiritual door and awakens the mind to its spiritual path. It is a key that has been thrown away and ignored by the intellectual, learned and academic community. It has appeared in all great cultures throughout history. It has been dismissed by intellectuals, suppressed by religious zealots and brought into disrespect by fortune- tellers and dabblers. This knowledge if properly understood will transform the earth and the people on it. This book was written for those few who are strong enough to take on the responsibility of spiritual evolution and so discover how sacred and beautiful life truly is.