[erdevs]

Mathematics often deal in abstractions, and "God" may be used as a linguistic abstraction for ideal or perfect knowledge. It's a shorthand in writing casually about the most elegant mathematical insights. Its use is also a tradition via Erdos with "The Book", which Aaronson and many mathematicians pay homage to.

[michannne]

Right. AFAIK there is no universal Math deity like there is Caissa for chess that can serve as a representation of "perfect math", God is the next best thing.

[adamnemecek]

I understand what it means, but I still don't like it.

[AlanYx]

If it's any consolation, Erdős himself said in one famous lecture that the "God" part is irrelevant: "You don't have to believe in God, but you should believe in The Book."