You know, on the spectrum of religious belief, there is atheism - these are people that don't believe. There's theism - these are the believers and agnostics say it's beyond comprehension that the whole issue of God us unknowable. You might be interested to know that perhaps the greatest mind of the 20th century Einstein, the one time that he actually used one of these appellations was in a letter about five years before he died and he referred to himself as an agnostic.