According to the Oxford English dictionary (religious) faith is "strong belief in the doctrines of a religion, based on spiritual conviction rather than proof."
I would agree with that, but why would they specify religious faith? I'd write that faith is insufficiently justified belief whether that's unjustified belief in gods or in ideas such as election hoax, vaccine hoax, climate hoax, moon landing hoax, and spherical earth hoax, which are just as spiritual as any other belief held by faith - that is to say that there is nothing spiritual at all about being willing to believe something.
From Pat Condell: "Faith is nothing more than the deliberate suspension of disbelief. It's an act of will. It's not a state of grace. It's a state of choice, because without evidence, you've got no reason to believe, apart from your willingness to believe. So why is that worthy of respect, any more than your willingness to poke yourself in the eye with a pencil? And why is faith considered some kind of virtue? Is it because it implies a certain depth of contemplation and insight? I don't think so. Faith, by definition, is unexamined. So in that sense it has to be among the shallowest of experiences"
This is much of the harm that teaching children and others that faith is a good thing does. It's practice for believing what you are told uncritically whatever that is.
FAITH IS BEING SURE OF WHAT YOU HOPE FOR AND CERTAIN OF WHAT YOU DO NOT SEE. How can it be any more direct than that? There is no belief in that statement.
I would agree with that if we changed "what you don't see" to "that which lacks sufficient evidence to justify belief in." as Condell, alludes, there is nothing virtuous about that. It's a logical error and the fast track to accumulating false and unfalsifiable beliefs.
So what? According to the Bible, "... faith is the assurance of things hoped for, the conviction of things not seen." So, the Oxford English Dictionary got it wrong!
The translation seen most often calls faith substance and evidence: "Now faith is the substance of things hoped for, the evidence of things not seen." Faith is insubstantial and belief by faith sidesteps evidence.
present faith is not an ancient mythical world view of God or Gods based on the various conflicting ancient tribal text without provenance.
Faith is the same today as it was then even if what is believed by faith has evolved. It's that shallow, unexamined experience Condell described. And those newer formulations of the meaning of scripture come from humanist and scientific sources, so today, we don't have Western Christians saying that man should submit to autocrats or that slaves should submit to masters, and many now say that they don't believe those myths literally.
But they also won't call those myths erroneous speculations as they would the myths of other religions. We're told often that stories like those about Noah and Job contain deep spiritual truths, but I don't think so. What deep spiritual truths? I can't name one. Can you? It's hard to imagine why such stories were included in scripture. They're both unflattering to the deity in them.
Speaking of myth, what is spiritual truth? What are spiritual realms or spiritual beliefs or spirits? I know what a spiritual experience is, but spiritual experiences are unrelated to spirits or imagined realms outside of time and space where spirits are found, and they contain nothing that can rightfully be called truth.
The Bible is the world's most published book, with estimated total sales of over five billion copies, and has existed for thousands of years. In contrast, the OED has been around for a mere 167 years.
So what? Is that an endorsement for its reliability?
I wonder what percentage of Bibles were purchased or read by those who have them in their possession? I suspect that for most believers, the bible is like a software license. Most don't read it. They effectively just scroll down to the bottom and click "I agree."
Incidentally, THAT's what metaphor, parable, fable, and allegory look like: known things substituted for other known things such as licensing agreements for Bibles, or apples (of one's eye) for a known object of affection or value. Myths don't do that.