What if the big bang wasn’t just an implosion of spaces particles? What if the big bang was in actuality a collision of two parallel dimensions? Who is to say there are no entities larger than a “universe”? It is just as much a leap of faith to believe that there is only one universe when there could very well be a complex network of parallels—that is to say, a multiverse.
And thus they follow blindly, not knowing what lies beyond.