Suppose we loosely define a religion as any discipline whose foundations rest on an element of faith, irrespective of any element of reason which may be present. Quantum mechanics for example would be a religion under this definition. But mathematics would hold the unique position of being the only branch of theology possessing a rigorous demonstration of the fact that it should be so classified.
Source: H. Eves In Mathematical Circles, Boston: Prindle, Weber and Schmidt, 1969.
Contributed by: Zaady