(Sometimes called the Egyptian Cross or Cross of Life.)  This is not in fact a true cross but it is rightly referred to as a ‘Key’.  It is ‘The Key to the Mastery of Life’ and originally symbolized the esoteric Egyptian mysteries.  Where it is depicted in Ancient Egyptian paintings those carrying it were initiates into the mysteries.  They held ‘The Key to Life’.  It was only later that this symbol became confused with a cross.  Nowadays it can properly be used only to signify the Mastery of Life or the Hidden Knowledge or Higher Mysteries.