Full Idea
The set-theoretical paradoxes are hardly any more troublesome for mathematics than deceptions of the senses are for physics.
Gist of Idea
Set-theory paradoxes are no worse than sense deception in physics
Source
Kurt Gödel (What is Cantor's Continuum Problem? [1964], p.271), quoted by Philip Kitcher - The Nature of Mathematical Knowledge 03.4
Book Reference
Kitcher,Philip: 'The Nature of Mathematical Knowledge' [OUP 1984], p.63