Don't get spacey. Some things are just real.

[Richard Fiero]

Some mentions of Crisis in AtD.
Out of twenty uses in AtD of the word "crisis" three relate to maths.

"It was not so much a conventional museum as a strange underground
temple, or counter-temple, dedicated to the current "Crisis" in European
mathematics . . ."

"Weierstrass, in 1872, had inaugurated the great Crisis that 
continued to preoccupy mathematics even to the present"