Full Idea
Kant distinguished the 'mathematical' and 'dynamical' sublime. The former involves immeasurable greatness (or smallness) such that we cannot even present them to ourselves. The latter is of something large and overpowering, which we can morally resist.
Gist of Idea
The mathematical sublime is immeasurable greatness; the dynamical sublime is overpowering
Source
report of Immanuel Kant (Critique of Judgement I: Aesthetic [1790]) by Terry Pinkard - German Philosophy 1760-1860 13
Book Reference
Pinkard,Terry: 'German Philosophy 1760-1860' [CUP 2002], p.339
A Reaction
Presumably Cantor revealed the full extent of the mathematical sublime ('heaven', according to Hilbert). We await the comet that destroys the Earth to fully experience the other one.