Self is everywhere, shining forth from all beings, vaster than the vast, subtler than the most subtle, unreachable, yet nearer than breath, than heartbeat. Eye cannot see it, ear cannot hear it nor tongue utter it; only in the deep absorption can the mind, grown pure and silent, merge with the formless truth. As soon as you find it, you are free; you have found yourself; you have solved the riddle; your heart forever is at peace. Whole, you enter the whole. Your personal self returns to its radiant, intimate, deathless source.

~ Mundaka Upanishad