Q: Where is that reality of eternal truth to be found?
A: Begin by accepting the very important statement that all truth is subjective. Do not waste lifetimes looking for an objective truth because no such thing exists. Even if it did, it could not be found except by the purely subjective experience of it. All knowledge and wisdom are subjective. Nothing can be said to exist unless it is subjectively experienced. Even a supposedly purely objective material world, if it existed, could be said to exist only because of one’s subjective sensory experience of it. Even the most rabid materialist is stuck with the fact that in the end, it is only their own subjective awareness that gives it the authority of believability.