That feeling as the breathe leaves your body and with it the resistance. The thin ...

... veneer of illusion fades and the contortions of the mind dissipate.
Truth is felt in the body as a sensation. A union with something both within and outside yourself at the same time. It's a boundary dissolution. It's not a thought. Not something you can read or come to a conclusion upon by the straining of the brain. No language, belief system, or civilization has ever stubled upon it to a degree of accuracy that is in anyway eternally usefull to us.
Because all language is a lie. History is the story of languages, religions, and civilizations that have failed us on our path to truth and ultimate transcendental understanding.
It is something that can only be experienced through the body. So return to your body. Worship the body. Love the body. And use whatever method upon your body you deem effective. Breathe, sound, movement, plants, rythm . . .find your tools. Use your tools and use your body. It's the greatest tool we have for experiencing ourselves. The body won't betray you. So don't betray the body. It's urges, desires, cycles, pains, pleasures, wants, needs and limits are our greatest teacher. Find the transcendental within them. There is no need for institutions, scriptures, dogma or hierarchical beliefs. Find it within yourself. Find it for yourself. And then find yourself. And don't let anyone take that away.
You are what you're looking for.