Thanks for your comments. How can we all have the truth if we believe in very different ideas and religious doctrines?
What we believe is the proposition, and everyone has a unique set of propositions. Propositions aren't the truth, they are just words/ideas. The answer to your question lies in the habitual mistake of words/ideas for the truth.
Looking at the world from the "inside," we tend to think that our thought is all there is. In a sense it is everything, because it's what we have to work with. It's all we have to work with: our thought represents everything
about the real world. in each conscious moment we do a "take" of the world, and in that moment the thought of heat is heat, the thought of hunger is hunger, the thought of anger is anger, the thought of an isosceles triangle is an isosceles triangle. We forget that there's a real world behind our thought, and indulge our thought as the real world.
It's a world full of words/ideas, one for everything "thing" our thought has identified about the world, and that is from where we derive propositions. Some "things" have real world correspondents (hunger), and some don't (anger), but in indulging the world of thought as real, we blur the distinction between them. We can analyse a situation composed of any proposition, like hunger--what came before, repetitive incidences, similar conditions--and conclude that we have a cause and a solution for a problem. Let's go eat. And we can analyse a situation like anger in the same way, and, in doing so, we make anger something real, although it lacks a real-world correspondent.
That's what makes us most human: the capacity to reason (and the hubris that tells us that we are clever for it). In our forgetful state, we allow that the propositions we have worked with are us working with the real world. Because our solution works, we allow that the proposition be the truth, we allow that it represent the real world.
When I say that I believe in truth, I am not pointing at the propositions as truth (that "I believe in truth" is a proposition, so that would be an entirely circular thing to do). Truth is what informs words/ideas to accurately represent the real world. That means that it is something a step removed from the real world. As that world
to each of us is composed in thought, composed in propositions, that places truth on a different level, a meta level in relation to the world. Truth is an abstract of thought, an integral part of our conscious relation to the world.
