Boghossian: What would it take for you to believe in God?
Dawkins: I used to say it would be very simple. It would be the Second Coming of Jesus or a great, big, deep, booming, bass voice saying “I am God.” But I was persuaded, mostly by Steve Zara, who is a regular contributor to my website. He more or less persuaded me that even if there was this booming voice in the Second Coming with clouds of glory, the probable explanation is that it is a hallucination or a conjuring trick by David Copperfield. He made the point that a supernatural explanation for anything is incoherent. It doesn’t add up to an explanation for anything. A non-supernatural Second Coming could be aliens from outer space.
[Peter Boghossian begins to speak and is in full agreement with Dawkins, arguing, for example, that if the stars spelled out a message from God, we would first have to rule out alternative explanations, like an alien trickster culture.]
Dawkins then agrees with Boghossian.
Boghossian then asks him: So that [stars aligned into a message] couldn’t be enough. So what would persuade you?
Dawkins: Well, I’m starting to think nothing would, which, in a way, goes against the grain, because I’ve always paid lip service to the view that a scientist should change his mind when evidence is forthcoming. - https://shadowtolight.wordpress.com/2015/08/31/richard-dawkins-admits-that-nothing-can-persuade-him-god-exists/
God would only need to speak in a still small voice into Dawkins’s heart, convince him of his sin, call him into the Life, and of course then Dawkins would be a believer.
If Dawkins is among the elect, then he would be brought to faith at some point.