"...truth, as my uncle Roger used to say, is just one man's explanation for what he thinks he understands."
--the character Easy Rawlins, Bad Boy Brawly Brown, by Walter Mosley
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I like that. The older I get, the less I believe in the idea of objective truth: we all color what we see based on our experience and expectations far more than we think we do, and that's true even when what's under discussion is a simple chain of physical events.
When we're interpreting human action and interaction, it goes right off the map into subjectivity. Sometimes we're aware of it; sometimes we aren't. But when even physics has no absolute objective truth (observers modify what they observe; Heisenberg's uncertainty principle), then it's impossible for philosophy or religion to do so. Not if they're absolutely honest, anyway.