religion claims absolutely to know the truth (sometimes in spite of measurements and scientific reasoning), and those truths are immutable - like axioms in a mathematical system.
The Abrahamic religions’ conservative/fundamentalist strains, perhaps, but not their liberal/progressive/reform strains. And I don’t believe this has ever been true for the eastern religions. I mean, would the parable of the blind men and the elephant ever find its way into belief systems claiming absolute truth?