The Yoga Sutras Of Patanjali - Samadhi Pada
Now begins the sacred instructions of union.
Union by stopping mind activity.
At this time the seer enters their own true state.
At other times the mind fluctuates and the seer identifies with this. The seer is then elsewhere.
There are 5 fluctuations. They may affect us positively or negatively.
Correct perception, incorrect perception , imagination, sleep and memory.
Correct perception is derived from direct experience, spiritual text,
inference or proven facts.
Incorrect perception is illusion based on false beliefs
that have been observed, accepted, and embraced.
Verbal knowledge that lacks substance is from imagination.
There is an absence of awareness in sleep. Condition the
mind for sleep without dreams. This is deep sleep.