Stargate: The Ark of Truth introduces a very old artifact into Stargate mythology. The Ark of Truth was designed to give knowledge of the truth to those who look into it. In particular, it was designed by those who were resisting the Ori, advanced beings masquerading as gods in order to gain power from those who worshiped them. Somehow (we're not told anything more than this of how), those who look into the Ark of Truth suddenly know that the Ori are not really gods and are not really good at all, that they've been lying to their followers about rewarding them upon their death, and that their primary purpose is to gain enough power to be victorious over their similarly-advanced fellow ascended beings who had departed from their galaxy into ours.
So what is it exactly that the Ark of Truth is supposed to do? It's presented as giving this knowledge somehow to those who look into it. I'm not so much interested in the process of how it accomplishes this as I am in the result. What does this knowledge consist of? It doesn't seem to involve being given any actual evidence in terms of beliefs that then support a further belief. It must involve their somehow seeing what is wrong with their previous beliefs, somehow simply being given the ability to know something that they didn't have enough information to know beforehand. It seems almost like a miraculous ability to know something. One reason for thinking this is that they explicitly say in the movie that the Ark of Truth can't be reprogrammed to convince those who look into it of some falsehood, so it could never be abused if it fell into the wrong hands. It could only be used to give knowledge of the truth. So somehow its mechanism leads to genuine knowledge and doesn't just operate in a way that convinces someone that something is true without being connected to its actual truth. Whatever it does is somehow tied to the thing's actually being true.
I've seen the movie several times now, but it wasn't until the most recent time a week or so ago maybe that this even occurred to me, and it reminded me of a suggestion John Hawthorne offers in his "Arguments for Atheism" chapter of Reason for the Hope Within. He calls it the Gift of Faith. He's responding to the no-evidence argument for atheism, i.e. the claim that we should believe what we don't have enough evidence for and that there isn't enough evidence to believe in God, so we should be atheists.
The Gift of Faith is a possibility Hawthorne proposes for why it might be perfectly fine to believe in God without any evidence at all. He says that, for all we know, some people might be given this ability simply to know that God exists. This ability might just be something God gives to some people. Faith here is nothing like the notion of a leap of faith, where you believe despite having no good reason to believe. Faith here is a kind of knowledge, an ability given by an omnipotent being to allow someone to know of the existence of that being and enough of the nature of that being to know that it's worth following that being. Hawthorne argues, then, that since atheists can't rule out this possibility, they can't go on to argue that the lack of evidence makes theists irrational. Perhaps they have this ability to know God's existence that the atheists making the argument against theism don't have. They can't rule out that possibility, so their skepticism about God by the very skeptical standard they propose (not believing in something without enough evidence) has to falter (because they don't have any evidence for the claim that no one has the Gift of Faith).
The Ark of Truth, then, seems like a nice science fiction device that captures some of what Hawthorne had in mind with his Gift of Faith. The Gift of Faith seems to be very much the same sort as what the Stargate writers (particularly Robert Cooper, in this case) were thinking the Ark of Truth would do. A lot of people I've discussed this with have found the notion of the Gift of Faith hard to make sense of, but Robert Cooper at least found something very similar comprehensible enough to base an entire Stargate movie on.