One thing to consider is that there is three contexts of infinity that you must take into consideration if you were wanting to fully understand the word and meaning in multiple contexts.Infinity can be found in nuber system where it can be treated as a number(in this context infinity does not exist), topological science such as certain seqences of numbers to converge to(in this context infinity does exist),measuring sizes of sets where it is a measurmentof the size of an infinite set(in this context,such "infinity" concepts do exist but there are more than one of them, since not all infinite sets have the same size. So there does not exist any one single "infinity" concept; instead, there exists a whole collection of things called "infinite cardinal numbers". Anyways, infinity is in my opinion an individuals stand point. A great link in my opinion is http://www.math.toronto.edu/mathnet/answers/infinity.html