Mathematics … is the only religion able to prove itself to be one.

[…] it has been suggested that if we were to define a religion to be a system of thought which contains unprovable statements, so it contains an element of faith, then Gödel has taught us that not only is mathematics a religion but it is the only religion able to prove itself to be one.

— John Barrow (English cosmologist, theoretical physicist and mathematician, 1952 – )