ubiquitin – there are indeed different infinities and some are bigger than others. It may be a cabbalistic concept introduced by George Cantor and labeled as Alef, mabye the only Hebrew math symbols in the sea of Greek letters [just found out that there is also a Bet[.
Infinity of real numbers (aleph_1) is higher than those of natural numbers (aleph_0). Maybe Georg Cantor introduced these numbers as a tribute to his semi-denied Jewish ancestors. He definitely felt that his theories of infinity relate to G-d.