Personally, I don't see how there can be an uncaused cause, a beginning of time, or a smallest/indivisible unit of matter. To me infinity makes a lot of sense. There is an infinite series of causes, there is no beginning of time (what would come before that?), there is no indivisible unit of matter (everything gets infinitely smaller. If something has a left and a right side, it must be divisible. Then again, If something was 1-dimensional, by definition, it wouldn't have a left and a right side. But I don't think 1-dimensional objects (points) can exist because they could not lie contiguous to each other to create 2-D. If they did, they would have a left and a right side). I'm not entirely sure of any of the above. I don't have an extensive knowledge of string theory or any of that.