A First-Principles based approach:
There are two kinds of ‘Truths’. There are personal truths and then there are universal truths.
Personal truths are true for the individual based on their life experiences. These are interpretations of events and the meanings we give to our life experiences. Universal truths are true for everyone regardless of whether or not we are aware of them. These form the underlying mechanism for our life and our world.
Let’s indulge in a small metaphorical thought experiment: Look around where you are right now and notice what you’re seeing. As I’m writing this, I’m looking around and seeing the walls of my room, a table, curtains and the view of a hill outside my window. Now, it is ‘true’ that I’m actually seeing all of these. What is more true is that all I’m ever actually seeing is only light.
My personal truth in this situation is the specific things I’m seeing. The universal truth is that all of us are only ever seeing light.
Similarly, first-principles are a way of talking about and pointing to the fundamental universal truth behind the human experience. It is the same truth that is observed and pointed to through the ages in science, philosophy, psychology, religion and spirituality. These first principles or first causes are true in the sense that they are not merely individual or personal truths, but are universally true for all human beings. These are not a theory or model that offers a new perspective. Rather, they are fundamental axioms that offer a direct perception of what’s already true for us. This is possible through experiential/non-conceptual insight.
In short hand, the 3 fundamental self-evident principles behind every human being can be summarized into 3 statements: “We are alive”, “We are aware” and “We have the capacity to think and feel”. Everything else that we can talk about or experience in life can be explained from these three fundamental universal truths.