How can one say there is an "absolute truth" other than that it would be the overall perception of humans once they see it for themselves, mathematically, scientifically or physically? Everything is up for individual interpretation. Everything is individual truth, it's what you believe (with as little doubt as possible) and what neither you not someone else could convince you of otherwise.

EDIT: I'm generalizing of course, because many things we see physically are not necessarily the truth to all. There are some things that are seen as absolute by the vast majority of people, especially mathematically and scientifically, but scientific fact is especially subject to change over time.