Sentence:  Only in certain occult and mystics states: in <WSD>orison</WSD>, contemplation, ecstasy iand their allied conditions, does the self contrive to turn out the usual tenants, shut the "gateways of the flash,"  and let those submerged powers which are capable of picking up messages from another plane of being have their turn. 
Meaning of the word marked with <WSD> tags:  Mystical contemplation or communion.