A Quote by E. J. McShane on world
There are in this world optimists who feel that any symbol that starts off with an integral sign must necessarily denote something that will have every property that they should like an integral to possess. This of course is quite annoying to us rigorous mathematicians; what is even more annoying is that by doing so they often come up with the right answer.
Source: Bulletin of the American Mathematical Society, v. 69, p. 611, 1963.
Contributed by: Zaady