I am sure this has been addressed earlier, and I just skimmed these pages and ignored several flaming pages. But here are my simplest thoughts.
Revealed to whom?? Revealed to entire mankind all at once? A group or person long ago or a modern group or person? Lots of groups or individuals over time? Any of these, if they can be corroborated? If so, then I would submit that God has revealed personal love to me. And that revelation corroborates with individuals and groups, past and present.
Loving a spouse or child is reflexively chalked up to "nature", but I think we go well beyond the animal world with our emotional connections. Human love can be passionate--and not simply erotically passionate. Love has public and private faces--hopefully we experience both kinds, but I am not sharing my husband with anyone to prove my own experience--it would simply never work! I wouldn't leave him for being unable to prove it, either.
I use the above example as a springboard only say I recognize the personal experience of love. I "learned" that God loves me in first grade, but it was not experienced/revealed/known until a few years later, and always by surprise. Like seeing the sun with my own eyes, versus hearing about the sun from books at school. I have seen the sun; many others have, too. In my whole life, it's what I value the absolute most: knowing (experiencing) that God passionately loves me.
And from that, I honestly believe that everyone is deeply loved by God, passionately. Many (if not all) of you will eventually discover/experience this, too, I believe.
<----2 cents...?
bebu
PS: AS, very interesting about fire. Good "fuel" for thought.