I have to believe in a world outside my own mind. I have to believe that my actions still have meaning, even if I can't remember them. I have to believe that when my eyes are closed, the world's still there. Do I believe the world's still there? Is it still out there?
Back then, Einstein was still a clerk, none of the world wars happened, Wright brothers didn’t yet fly, cars were just shaping up it’s amazing to think how far we have come in just 100 years. Compare this with how much development we made in any 100 years before that, It’s fascinating and frightening at the same time.