We have to conclude that [Bertrund] Russell’s account [the scientific method] does not do justice to the way science actually works. If we attend only to the textbook writers and the popularizers of science we get the impression that all this is “fact,” quite different from the worlds of imagination and intuition in which poets move and from the world of faith in which religious people move. But if we look at the way scientists actually work, we see that this is a false impression. There are not two separate avenues to understanding, one marked “knowledge” and the other marked “faith.” There is no knowing without believing, and believing is the way to knowing. The quest for certainity through universal doubt is a blind alley. The program of universal doubt, the proposal that every belief should be doubted until it could be validated by evidence and arguments not open to doubt, can in the end only lead — as it has led– to universal scepticism and nihilism, to the world which Nietzsche foresaw and which Allan Bloom and other contemporary writers describe.
Lesslie Newbigin, The Gospel in a Pluralist Society (p. 32-33)