Faith is different from proof. One is human and the other a gift of God. 'The just shall live by faith' (Rom. 1:17). This is faith that God himself puts into our hearts, often using proof as the instrument. 'Faith comes by hearing' (Rom. 10:17). But this faith is in our hearts, and makes us say not, 'I know' but 'I believe'.
- Blaise Pascal, Pensées, trans. A. J. Krailsheimer (Great Britain: Penguin Group, 1966), #7