A glow of confidence filled him, as it fills the mathematician when the solution of the problem is sensed long before it is reduced to worked out figures upon a paper.
The Jackson Trail, 1932, p. 204
Note: Authors use mathematical ideas as analogies, e.g. this western novel by Max Brand. The character is Jesse Jackson, a western-verison of Robin Hood. So, as you spend time catching up on your reading this summer, send me your quotations from "math-inflitrated" novels.