Simple enough for every reader?

Are you aware of the fact that in
{1}
{1, 2}
{1, 2, 3}
...
{1, 2, 3, ..., n}
...
up to every n infinitely many natural numbers of the whole set
{1, 2, 3, ...}
are missing? Infinitely many of them will never be mentioned individually. They are dark.
Regards, WM