The criticisms of mystics in The Hidden Teaching Beyond Yoga were deliberately overstressed in order to give them a shock and wake them up. They are wedded to the forms of experience, such as mystical visions, to the duality of existence, such as spirit and matter, to the personal self, which makes them desire and gloat over meditational ecstasies. They do not see that these represent an intermediate stage towards the Real but are not the Real. This does not mean that mysticism is to be given up; on the contrary it is essential, but its limitations must be understood.
-- Notebooks Category 12: Reflections > Chapter 5: The Literary Work > # 207