Does anybody know the source of this quote??? ?

Question

(Paraphrased): "To a believer no proof is necessary, to a skeptic none is possible". I have seen this a lot and have not been able to trace the etiology/original author.

Answer 1

i googled and the most likely answer is

joseph dunninger~ 1892-1975

magician/mentalist

also attributed without sources to

edgar cayce

stuart chase

Answer 2

not sure who said but it is an interesting quote.  

Answer 3

The quote traces back to Stuart Chase, an American economist and engineer. The quote is:

"For those who believe, no proof is necessary. For those who don't believe, no proof is possible."