"The known, the changeable, is what you live with — the unchangeable is of no use to you. It is only when you are satiated with the changeable and long for the unchangeable, that you are ready for the turning round and stepping into what can be described, when seen from the level of the mind, as emptiness and darkness. For the mind craves for content and variety, while reality is, to the mind, contentless and invariable. Q: It looks like death to me. M: It is. It is also all-pervading, all-conquering, intense beyond words. No ordinary brain can stand it without being shattered; hence the absolute need for sadhana. Purity of body and clarity of mind, non-violence and selflessness in life are essential for survival as an intelligent and spiritual entity. Q: Are there entities in reality?"