Andrew, Here is an example of what I could call a 'lesser' mystery (secret teaching). We must die in order to live. We must slay the person (personality) within. We must cause our mind, intelligence, and personality to completely be subdued or silenced, in order to finally allow ourselves to become conscious on a higher plane of consciousness, the plane of consciousness that our Higher Self works on. Only when we can become conscious on that Higher plane will we be ready for enlightenment and then nirvana (two entirely different things.). Most people cannot fathom the idea of slaying their intellect and personality (and huge ego). This is a mystery of a lesser type, taught by many religions. We can only hope for the day when we prove ourselves worthy of learning the higher mysteries (mysteries which are now hidden from us).