I don't know if I'm doing this proper, but upon request this is a repost from the Kill them with kindness forum.

What is that expression that concludes that "proof" is for alcohol and . . . something else. To me, the interesting thing about "proving" the supernatural would be the effects of that perhaps being that it would no longer be supernatural. The implication, of course, being that if we can't understand it we must deny it. At one time whales and squid were thought of as "supernatural," not that that means much. 

From a strictly atheistic point of view I don't see how it could matter because most atheists  I have talked with believe in the possibility of there being other intelligent life forms in the universe. Angels? Oh, no! That isn't possible because the Bible says so. On the other hand at Galatians 5:20 Paul uses the Greek word pharmakia, from which comes our English word Pharmacy. It is most often translated as "spiritism" because drugs were, and still are in primitive societies, used as a means to access the spirit world. Of course - the sort of "proof" of which you speak is, under the influence, difficult to to document and confirm. Then again, can you "prove" that we evolved or can you assume that based upon our obviously poor observation that we did because other than the Bible there is no explanation? Can you prove the air you breathe is real or how much do we know about black holes? 

Its all a great deal more wishy washy than we like to think. The best you can do is study the Bible with eyes open and go from there.