It suddenly struck me today when I heard somewhere that "the universe is infinite". Well I know from physics that it isn't. So I thought about what could make somethine infinite. I mean a finite number of objects would make a finite entity, so there's no way you could get an infinite entity with finite objects. So what are the ingredients of an infinite entity? But then again, numbers are finite, and they can be arranged in infintely to form an infinite set of numbers. I'm so confused. I'd be delighted to see some books recommendation about this subject.