What is faith? Is faith necessarily a matter of belief in God, or in religious doctrines? Is faith by necessity in contrast to, or divorced from, reason and rational thinking? Even to begin to understand the problem of faith one must differentiate between rational and irrational faith. By irrational faith I understand the belief (in a person or an idea) which is based on one’s submission to irrational authority. In contrast, rational faith is a conviction which is rooted in one’s own experience of thought or feeling. Rational faith is not primarily belief in something, but the equality of certainty and firmness which our convictions have. Faith is a character trait pervading the whole personality, rather than a specific belief.
Rational faith is rooted in productive intellectual and emotional activity. In rational thinking, in which faith is supposed to have no place, rational faith is an important component. How does the scientist, for instance, arrive at a new discovery? Does he start with making experiment after experiment, gathering fact after fact, without having a vision of what he expects to find? Rarely has a truly important discovery in any field been made in this way. Nor have people arrived at important conclusions when they were merely chasing a fantasy. The process of creative thinking in any field of human endeavor often starts with what may be called a “rational vision,” itself a result of considerable previous study, reflective thinking, and observation. When the scientist succeeded in gathering enough data, or in working out a mathematical formulation to make his original vision highly plausible, he may be said to have arrived at a tentative hypothesis. A careful analysis of the hypothesis in order to discern its implications, and the amassing of data which support it, lead to a more adequate hypothesis and eventually perhaps to its inclusion in a wide-ranging theory.
The history of science is replete with instances of faith in reason and visions of truth. Copernicus, Kepler, Galileo, and Newton were all imbued with an unshakable faith in reason. For this Bruno was burned at the stake and Spinoza suffered excommunication. At every step from the conception of a rational vision to the formulation of a theory, faith is necessary: faith in the vision as a rationally valid aim to pursue, faith in the hypothesis as a likely and plausible proposition, and faith in the final theory, at least until a general consensus about its validity has been reached. This faith is rooted in one’s own experience, in the confidence in one’s power of thought, observation, and judgment. While irrational faith is the acceptance of something as true only BECAUSE an authority or the majority say so, rational faith is rooted in an independent conviction based upon one’s own productive observing and thinking, IN SPITE OF the majority’s opinion.
