Faith and evidence
Can faith, or trust in a teaching, show us truths that evidence cannot? Or should we believe only what evidence supports? Evidentialists demand evidence. Others defend faith that goes beyond it.
What it is
Faith means different things, but at its core it is trust: in a person, a teaching or a God. It usually includes belief, and it usually involves acting on that belief even though it has not been proved. This raises an old question. If a belief goes beyond what the evidence shows, can it still be reasonable? Is there such a thing as knowing by faith, or does honesty require us to hold back until the evidence is in?
The question applies outside religion too, whenever we trust a friend, a doctor or a teaching without being able to check it ourselves.
The main views
- Evidentialism. Beliefs should rest on adequate evidence. William Clifford said we have a duty to act only on well-founded beliefs, and David Hume held that a wise person proportions belief to the evidence.
- Fideism and the leap. Faith ventures beyond evidence, and that is part of what it is. Søren Kierkegaard described faith as holding on to objective uncertainty with passionate commitment.
- Faith as properly basic. Alvin Plantinga argues that belief in God can be justified without arguments, in the way that belief in memory or in other minds is.
- Pragmatic reasons. William James held that when a choice is real, unavoidable and cannot be decided by evidence, a person may let their wishes decide. Pascal argued that it is rational to believe when the stakes are infinite.
- Faith and reason together. Aquinas held that reason and faith both reach truth and can support each other.
An example
Suppose you have been told by someone you deeply trust that a certain way of living leads to a good life. You cannot check it in advance, only live it and see. Evidentialists would say that you should treat the trust as a hypothesis until it has been tested. Others would say that some truths can only be reached by committing before you have proof, and that waiting for certainty means never finding out.
Why people still disagree
- Is the evidence ambiguous? If the evidence equally supports belief and disbelief, it is not clear what makes faith reasonable, or whether faith is needed at all.
- Can you choose to believe? Critics point out that belief is not simply a matter of will. We cannot believe something merely because it would be useful.
- Which faith? Many traditions claim a similar authenticity, which makes it hard to say that faith as such shows the truth of one.
- Where does trust end? All of us rely on trust in others for most of what we know. The dispute is about whether religious trust is of that kind.
Written by epchē in our own words, and checked against independent sources on 8 October 2026. The sources are listed below.
Philosophies that answer it
Where each philosophy leans on this question, from the same positions the walk uses.
Only evidence counts
Faith can show truth
Sources we used
- Faith · Stanford Encyclopedia of Philosophy, read on 8 October 2026
- Faith and Reason · Internet Encyclopedia of Philosophy, read on 8 October 2026