If i'm reading this correcty, i think what he is trying to get at. is that is there any evidience to support others believing in the pony dream to say that it without a doubt that it is true like creationist like to claim without a shadow of a doubt that their "God" is proof without a supporting evidence. So if you want to believe that he had a pony dream then sure believe him (since belief is a product of faith and faith is the supporting of things that cannot be poven. Now the problem is when the belief is implemented on society. When you kill or mandate laws because of the pony dream there is the problem
Bill Maher: If you believe that the world is going to come to an end - and perhaps any day now - does it not drain one's motivation to improve life on earth while we're here?