Well, it depends on what you mean by infinity.
As mindboggling as it sounds, there are different sizes of infinity.
(big infinity, or small infinity,... kidding... )
so the smallest "size" or cardinality of an infinite set is the size of the natural numbers (positive integers). This is countably infinite.
and Power set of X =set that contains all subsets of X, can be shown to be bigger than the size of X. This is uncountably infinite.
so there are infinite sets that are bigger than others.
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