I wonder those with all the abstract definitions in this thread wouldn't save themselves some mental gymnastics if they stopped believing altogether. That's pretty much my view - unless I need to appeal to God to explain why we should value something, I don't care to believe anything about it. I haven't reached that point yet.
If anyone here's interested,
a related essay is something Derek Parfit wrote on how we can understand reality's existence. It's philosophically hard but basically tries to use logical inference to break down some naive perspectives on why we think things are what they are.
