Regarding our inner experiences such as (second sight, psychic awareness, near death experiences, and)  precognitive dreams ...

"A man or a woman has a precognitive dream - simple enough to dismiss, particularly if unverified ... but when scientists in their own times come across such reports, we have another situation. These are  events that by their nature happen to people in their private moments, often under emotional conditions. To dismiss such a range of experience is shear nonsense.

It is one thing to state quite properly that such events are most difficult to assess scientifically, but quite another to deny their common recurrence in the behavior of mankind, or to dismiss paranormal events as fabrication, hallucination, or the natural reaction to drugs or shock. ...

It is precisely in such areas of such embarrassing subjects that the most challenging and hopeful achievements of science lie and precisely in those avenues of thought considered too hot to handle that the answers to man's  most pressing problems will be solved.

Any hypothesis is an assumption. and to that degree any hypothesis is an statement of faith, however qualified science is operating 'as if' one hypothesis is true or can be proven as true. Experience constitutes the greatest proof in the framework that an event is encountered. A scientist who has a precognitive dream (or other similar experience
0 is qyuite right to admit that he has experienced an event that science does not recognize as legitimate. but as a man he is bound to accept te proof of his own experience."

 - Pp 150-151