belief is not enough. there MUST be faith.

Swimmers during learn to swim week, at a suburban swimming pool, probably Wellington region, ca 1939,
originally uploaded by National Library NZ on The Commons.

'... one wants to be careful about the word "believing." We too often mean by it "having confidence or assurance as a psychological state"-- as we have about the existence of furniture. But that comes and goes and by no means always accompanies intellectual assent, e.g., in learning to swim you believe, and even know intellectually that water will support you long before you feel any real confidence in the fact. I suppose the perfection of faith would make this confidence invariably proportionate to the assent.'

from Words to Live By