faith something a bit more prosaic than that, something that we get just like we get faith in science or in the democratic process (perhaps a bad example at the moment!)? That is, we are persuaded about the truth of something based on the evidence
When it comes to faith, I think a distinction needs to be made between mere belief and trust. Faith is more than mere belief, i.e. even the demons believe and yet they tremble. I would say that faith includes belief, but the primary function of faith is a continual act of trust. We can have degrees of belief, i.e. I can believe more or less, but trust functions more in terms of how one lives in relation to the One trusted. Trust is relational.
Your science example is good. Do we believe science based on evidence? Yes, in part. But we also trust the method to deliver understanding, to predict outcomes, and to aid in developing technology that, in the past, has proven reliable. So, even with science we see this dual function of belief and trust.
This would eliminate faith being a choice --we don't choose to believe that the Earth is round, we either believe it or disbelieve it based on how persuasive we find the evidence for it. Similarly, don't we believe in Christ because we find all the evidences for it: the Bible, personal testimony and various philosophical arguments, complelling enough to make a commitment to believe?
I think this would be accurate if we think of faith simply in terms of mere belief. I can't pull myself up by the bootstraps and believe just any old thing. But once we add the element of trust, the dynamic of faith changes.
Let's say I am new to Christianity and have a low credence of mere belief, i.e. I believe the great truth claims of Christianity to a fairly low degree, if at all. Nonetheless, I trust the witness of others that if I seek I shall find. Moreover, I am willing to pray and read the scriptures assuming that if these claims are true God will reveal it to me (That's what my Christian friends tell me). So, I begin mostly with trust, but as time goes along I come to believe, more than before, which in turn strengthens my willingness to trust.
So, the dynamic, on a phenomenological level, entails more than mere belief and giving one's assent to evidence. Faith is lived in relation to a Person, so it is a matter of experiencing trust in relation to One who proves trustworthy. Of course, there are times when it can appear that the One we trust is hidden or silent, and at this point trust is still in play, since revelation, both in Christ and the scriptures, gives ample indication that such experience is part of the lived faith.
So is faith a gift or is it a reasoned response to the evidence that has convinced us, at least on balance, that it is true? Is "accepting Christ" a matter of accepting the evidence for the gospel story rather than accepting a gift?
In the sense that faith is belief in what strikes us as true, there is no merit in believing. If I did not simply choose to believe it is true, how can it be merit worthy? And since I can't pull myself up by the bootstraps and
reasonably believe just any old thing, then belief in the truth is not merit worthy. In other words, belief in the truth is something that happens to me.
And, if I just choose to believe whatever I decide to believe, then my belief has no ground in the truth, except perhaps by accident, which also would be of no merit.
In terms of trust, faith is also not merit worthy since it depends partially on the one in whom I have placed my trust. Assuming God is trustworthy, I should trust God and my doing so does not credit anything to my account, so to speak. In other words, I should trust those who are trustworthy.
If the above is true, then the question of whether or not faith is a gift becomes irrelevant. People assert that faith is a gift, most likely, because they want to ensure that it is not taken as being merit worthy, and thus somehow works in conjunction with grace. But, I have already shown that faith, whether we think in terms of belief or trust, is not merit worthy, so the point is moot (or the reason for the claim that faith is a gift becomes vacuous).
Of course, all that being said, it could still be the case that God enables the one with faith to both believe and trust so that it would still be true that faith is a gift.