Did the Polynesians who packed some canoes with food and coconuts, engage in wishful thinking?
Well, arguably yes, about the reasons volcanoes emit plumes of smoke and ash, but not about what those signs meant.
Do you think today, that you might be a person who entertains wishful thinking? When it comes to the question of whether you know if God is real, what can you tell yourself?
If you think God is real, is that wishful since it requires faith; if you think God isn't real, how is that not an article of faith?
Oh sure, someone who says they've never seen any evidence has a point, but how can they be sure they're looking in the right place?
What's wrong with the idea that God is real because we need a mythology that doesn't get in the way, type of thing? We understand, even if we don't think about it, that God is after all, a projection from ourselves onto the world, when really we should project this idea back onto ourselves, and accept that we are God. There is no external one, that's just the world, and it looks nice and everything, fascinating maybe, but it doesn't care what you think or believe.
So in effect, God is no big deal once you realise that all the ancient mythologies were just a coping mechanism, a way for humans to explain how they know to do things other animals can't do. It got more sophisticated as humans developed more complex cultures, but that's what it always was, and is now, something that's as real as humans need it to be. God explains human fascination, with the world and with themselves in that world. There is also the need we feel to apologise for being how we are, which is to say, for our ability to be savage and bloodthirsty. This has to be explained, because we also have the ability to be compassionate and caring.
Perhaps all God is then, is a way to explain this apparent dichotomy, we're alternately caring, gentle creatures who are also murderous and violent . . .
But personally I don't believe God is an idea.