There is Absolute truth and relative truth. Absolute truth you've never encountered even once in your life (if you had, you'd know). And relative truth is the domain of all other human knowledge. All science is relative truth. Physics is relative truth. That you were born and that you will die is relative truth. Etc. It's relative because all of reality is absolutely relative. A truth can only exist relative to some arbitrary standard which you designate. Without any standards, there is nothing true. Which is Absolute Truth -- utter groundlessness. This is difficult to understand unless you have a direct consciousness of the Absolute. Relative truth (like science) is useful stuff. It's important and necessary for survival. But just keep in mind that's not ultimately true. It's true only relative to your survival and present state of consciousness. Once your present state of consciousness is altered (like if you die), all science and other relative truths fly out the window. They become untrue because all along they were predicated upon you being alive as a human being. Yeah... this is heavy heavy stuff. Consider this: if you were an ant, which truths of yours would survive? Any?