As Kurt Gödel has proven that within any given branch of mathematics, there would always be some propositions that couldn't be proven either true or false using the rules and axioms ... of that mathematical branch itself. Refer to the website http://www.miskatonic.org/godel.html This is called incompleteness theorem. Why, because mathematicians defined infinity and then infinity of infinity, infinity of infinity of ... infinity…. Is the universe finite? All the researches up to today indicate it is not. It might be infinite - and we may not be be able to prove or disprove it. The same infinity rule in mathematics applies to our universe or the way we understand our universe. We can see 3rd, 4th or tenth dimension, at least some one can imaging. But we are never able to determine how many dimensions the universe actually has - unless we say it is infinite. Science, religions, or what ever philosophy always tries to convince us that there are something exists beyond our understanding. This is true. But I would accept that I, and human beings as mankind, never be able to understand the whole universe. And I will not just pick up something to warship as a god. Meanwhile I would follow scientists’ foot steps in order to understand more and more, even though more means nothing in terms of infinity, about the universe we live in and the inner universe of my own.