The one single truth of reality is not measured or distinguished -- it is the ultimate paradox. The journey by which one achieves this truth can be a journey of increasing realizations of paradoxes, and finally, freedom from the bubble of limitation of a mind that would perceive such paradoxes as paradoxes in the first place.
Truth is the same as spiritual feeling. Of spiritual perception. Of clear perception. Of freedom of the mind. Freedom of the soul. Freedom of the Heart. It is ultimate love and empathy. The end of struggle. Fully knowing the truth is to be enlightened. Fully realizing the truth is having transcended the distortions of the Machine (see The Machine at my web site given below). Truth means complete fulfillment and true happiness. Truth is impossible to change or destroy -- doing so contradicts the very nature of a single truth from which all things seen through distorted perception stem. Finding truth (and thus everything that it is) is the ultimate subconscious goal of all struggling. The search for truth, the want of truth, paradoxically, most often leads to illusion and darkness and pain. This is the case for the general spiritual state of humanity in the late Twentieth Century.
In this way, truth, freedom, love, clear perception, purity, transcendence, and enlightenment are all the very same thing. During the journey, one will no doubt see many facets of truth and see them as separate, distinguished, or part of a duality; but in time, one will see how they all link up and ultimately, how everything is a part of the same thing, and how perceiving everything in terms of truth is transcendence of distinguishment and knowing the truth; and in this way, being enlightened, free, and fulfilled -- attaining the ultimate happiness.
Transcendent of the Measurable.
What is perceived tangibly through the primary five senses (sight, hearing, touch, taste, and smell) contradicts the nature of truth which is actually transcendent of all distinguishments in the 'more tangible' environment.